answer:## Original RequirementsThe boss has asked for the design of a web-based video conferencing tool. ## Product Goals```python[ "Create a user-friendly web-based video conferencing tool", "Ensure high-quality video and audio during conferences", "Provide features such as screen sharing, chat, and recording"]```## User Stories```python[ "As a user, I want to easily start a video conference so that I can communicate with my team remotely", "As a user, I want to share my screen during a conference so that I can present my work", "As a user, I want to chat during a conference so that I can share information without interrupting the speaker", "As a user, I want to record the conference so that I can review it later", "As a user, I want to have a clear audio and video quality so that I can effectively communicate with others"]```## Competitive Analysis```python[ "Zoom: Offers high-quality video and audio, screen sharing, chat, and recording. However, it has faced security issues in the past", "Microsoft Teams: Integrated with Office 365, offers video conferencing, screen sharing, chat, and recording. However, it can be complex to use", "Google Meet: Easy to use and integrated with Google Workspace, offers video conferencing, screen sharing, chat, but recording is only available in the paid version", "Cisco Webex: Offers high-quality video and audio, screen sharing, chat, and recording. However, it can be expensive for small businesses", "Skype: Offers video conferencing, screen sharing, chat, and recording. However, the video and audio quality can be inconsistent"]```## Competitive Quadrant Chart```mermaidquadrantChart title Reach and engagement of campaigns x-axis Low Reach --> High Reach y-axis Low Engagement --> High Engagement quadrant-1 We should expand quadrant-2 Need to promote quadrant-3 Re-evaluate quadrant-4 May be improved "Zoom": [0.8, 0.7] "Microsoft Teams": [0.7, 0.6] "Google Meet": [0.6, 0.7] "Cisco Webex": [0.5, 0.6] "Skype": [0.4, 0.5] "Our Target Product": [0.6, 0.8]```## Requirement AnalysisThe product should be a web-based video conferencing tool that is easy to use and provides high-quality video and audio. It should also offer features such as screen sharing, chat, and recording.## Requirement Pool```python[ ("User-friendly interface for starting a video conference", "P0"), ("High-quality video and audio during conferences", "P0"), ("Screen sharing feature during a conference", "P1"), ("Chat feature during a conference", "P1"), ("Recording feature for conferences", "P2")]```## UI Design draftThe interface should be clean and intuitive. On the main page, there should be a prominent button to start a video conference. Once in the conference, the video feeds of the participants should be displayed prominently. There should be buttons for screen sharing, chat, and recording. The design should be minimalistic, with a focus on functionality.## Anything UNCLEARThere are no unclear points.

answer:Here is the C++ code that discovers the common elements within two integer arrays, named arr1 and arr2:```cpp#include <iostream>#include <vector>#include <unordered_set>using namespace std;int main() { int arr1[] = {12, 4, 17, 6, 21, 45, 33}; int arr2[] = {9, 21, 47, 33, 4}; unordered_set<int> set1(arr1, arr1 + sizeof(arr1) / sizeof(int)); unordered_set<int> set2(arr2, arr2 + sizeof(arr2) / sizeof(int)); vector<int> common; for(int element : set1) { if(set2.count(element)) { common.push_back(element); } } if(common.size() == 0) { cout << "No common elements found" << endl; } else { cout << "The common elements are: " << endl; for(int element : common) { cout << element << " "; } } return 0;}```In the code above, I firstly created two unordered sets from arrays - `set1` and `set2`. Unordered sets in C++ store unique elements in no particular order. These two sets are created to remove any duplicate elements that might be present in the arrays. Then, I created an empty vector `common`. Inside the for loop, if an element from `set1` is also found in `set2`, I pushed it in the `common` vector. Finally, I printed the common elements.Please note that using `unordered_set` to find common elements between two arrays is more efficient than using nested loops, especially when the arrays are large, because of the way it can search for elements in O(1) average time complexity.

answer:Here is the corrected Python script:```pythondef get_first_consonant_flanked_vowel(word): """ Given a word, find the first vowel that is enclosed by consonants from the left side of the word (case sensitive). Do not include vowels at the initiation or cessation of the word. Return an empty string if no such vowel found. The input string must only have English characters. Example: get_first_consonant_flanked_vowel("umbrella") --> "e" get_first_consonant_flanked_vowel("STRONG") --> "O" get_first_consonant_flanked_vowel("grape") --> "a" get_first_consonant_flanked_vowel("fly") --> "" """ vowels = 'AEIOUaeiou' for i in range(1, len(word) - 1): # Skip first and last characters if word[i] in vowels and word[i - 1] not in vowels: return word[i] return "" # Return empty_string if no vowel found# test cases to validate the solutionprint(get_first_consonant_flanked_vowel("umbrella")) # eprint(get_first_consonant_flanked_vowel("STRONG")) # Oprint(get_first_consonant_flanked_vowel("grape")) # aprint(get_first_consonant_flanked_vowel("fly")) # (empty string)```In your original script, the issues were mainly around incorrect characters due to OCR issues. OCR inaccuracy is common with handwritten text, certain typefaces, or poor image quality. Some specific issues in your code were incorrect characters in the function name, comments, variable names, string values, indentation, and print statements. Correcting these issues resolved the problem.

answer:Sure, this problem can be solved by taking advantage of datetime, pytz and holidays libraries. Here is a python function that can perform these operations:```pythonimport datetimeimport pytzimport holidaysdef timestamp_localizer(t_stamp, locale, t_zone, fmt, country='US'): # Make sure the timestamp is int t_stamp = int(t_stamp) # Use datetime and pytz to convert the timestamp to a localized datetime object dt_object = datetime.datetime.fromtimestamp(t_stamp, tz=pytz.timezone(t_zone)) # Create country-specific Holiday object country_holidays = holidays.CountryHoliday(country) # Check if the date is a holiday is_holiday = dt_object.date() in country_holidays # Check if the date falls on a weekend is_weekend = dt_object.weekday() > 4 # 5 and 6 corresponds to Saturday and Sunday # Convert datetime object to formatted string dt_string = dt_object.strftime(fmt) # Add details about holiday and weekend if is_holiday and is_weekend: dt_string += " (This is both a holiday and a weekend)" elif is_holiday: dt_string += " (This is a holiday)" elif is_weekend: dt_string += " (This is a weekend)" return dt_string# Testingprint(timestamp_localizer('1608481800', 'en_US', 'America/New_York', '%A, %B %d, %Y %I:%M %p'))```Please note that the function assumes if the `country` argument is not provided, then it defaults to `'US'` (for United States). If you want to check if a date is a holiday in another country, specify that country's two-letter code as the `country` argument. Also, the function assumes that Saturday and Sunday are weekends; if this is not the case for the country you are checking, you will need to modify the function accordingly.

answer:```C++#include <iostream>using namespace std;// Base Classclass BaseClass {public: BaseClass(){ cout << "Base Class Constructor Called!" << endl; } virtual void display() { cout << "Display Base Class" << endl; } virtual ~BaseClass(){ cout << "Base Class Destructor Called!" << endl; }};// Derived Classclass DerivedClass : public BaseClass {public: // Default Constructor DerivedClass(){ cout << "Derived Class Constructor Called!" << endl; } // Overloaded Constructor DerivedClass(int a){ cout << "Derived Class Overloaded Constructor Called!" << endl; } void display() { cout << "Display Derived Class" << endl; } ~DerivedClass(){ cout << "Derived Class Destructor Called!" << endl; }};int main() { // Scenario 1: --Creating Base Object-- BaseClass baseObj; baseObj.display(); // Scenario 2: --Creating Derived Object with Default Constructor-- DerivedClass derivedObj; derivedObj.display(); // Scenario 2: --Creating Derived Object with Overloaded Constructor-- DerivedClass derivedObjOverloaded(10); derivedObjOverloaded.display(); // Scenario 4: --Using Base Class Pointers-- BaseClass* basePtr = new DerivedClass; basePtr->display(); delete basePtr; return 0;}```Three type of Objects are created in the above examples:1. Object from the BaseClass2. Object from the DerivedClass using default constructor3. Object from the DerivedClass using overloaded constructor4. Polymorphic object, BaseClass pointer pointing to a DerivedClass object.Result:1. Base class constructor and destructor are called when a BaseClass object is created and destroyed.2. Derived class constructor and destructor are called when a DerivedClass object is created and destroyed.3. Overloaded constructor of the derived class is called when an overloaded constructor is used to create the object.4. Polymorphic behavior is demonstrated when BaseClass pointer is used to call the `display()` method which actually calls the `display()` method of the DerivedClass.

answer:This is a typical Python function you can use to solve the problem:```pythondef is_prime(n): if n < 2: return False if n == 2 or n == 3: return True if n % 2 == 0 or n % 3 == 0: return False i = 5 w = 2 while i * i <= n: if n % i == 0: return False i += w w = 6 - w return Truedef primes_in_lst(lst): return [is_prime(x) for x in lst]```The `is_prime()` function implements an optimized method to check if a number is prime or not based on the fact that all primes are of the form 6k ± 1. This allows the function to increment in steps of 2 and 4 instead of checking each odd number. This function will be more efficient than a usual primality check function when dealing with large numbers.The `primes_in_lst()` function uses list comprehension to apply the `is_prime()` function to each member of the inputted list and outputs a list of boolean values. If the number is prime, the boolean value will be True, otherwise it will be False.Here is a usage example:```python print(primes_in_lst([2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]))```This will output:```[True, True, False, True, False, True, False, False, False, True, False, True]```