Q1 ) (Degree of Multiprogramming) A computer system has enough room to hold five programs in its main memory.  In the below table, you are given these processes, their computation (CPU) and I/O times. Assume that at one point in time all processes are being executed, and assume that processes are independent. Answer the following questions.

Process ID	CPU Use	I/O Use
P1	50	50
P2	25	75
P3	25	75
P4	75	25
P5	50	50

a) Assuming all processes are independent  what is the CPU utilization on a single CPU system? (Hint: CPU is utilized if one of the programs is being executed and not waiting I/O)

b) Assuming all processes are independent  what is the CPU utilization on a two-CPU system? (Hint: A fully CPU-utilized system should have two processes executing in the two CPUs at any time, if a single CPU is idle, the system has 50% CPU utilization)

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