consider a system with four processors available for scheduling.ACPU-intensive application is running on this system. Four inputs are performed at program start-up, when a single file must be opened. Similarly, four outputs are performed just before the program terminates, when the program results must be written to a single file. Between startup and termination, the program is entirely CPU- bound. Your task is to improve the performance of this application by multithreading. The application runs on a system that uses the one-to-one threading model.

a) How many threads are needed to perform the input and output operations?Explain; b) How many threads are needed for the CPU-intensive portion of the application? Explain.