A system with two dual$-$core processors has four processors available for scheduling. A CPUintensive application is running on this system. All input is performed at program start$-$up$,$ when

a single file must be opened. Similarly, all output is 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 it$.$ The application runs on a system that uses the one$-$to$-$one

threading model $($each user thread maps to a kernel thread$).$

How many threads will you create to perform the input and output? Explain.

How many threads will you create for the CPU$-$intensive portion of the application? Explain.