Can a multithreaded solution utilizing multiple user$-$level threads demonstrate

improved performance on a multi$-$core processor system compared to a single$-$core

processor system? Justify your answer with an explanation.

Is it possible to have concurrency without parallelism? Provide an explanation.

Design a multithreaded program that generates prime numbers. The program

should prompt the user to enter a positive integer greater than $1.$ Once the input is

received, the program will create a separate thread that calculates and outputs all

prime numbers less than or equal to the entered number. Ensure that the program

efficiently handles the thread creation and synchronization.