4. There are 5 processes PO. P1, P2, P3, P4 competing for 4 resources R1, R2, R3, R4. At a given time, the situation is given below: Allocation Max Available ABCD ABCD ABCD PO 4001 7021 3221 P1 1100 1 650 P2 1045 3346 P3 0421 1562 P4 0312 2432 a. Find the Need matrix: b. Find the number of instances of each resource type: C. If there are no additional requests, show that the system is in a safe state. d. Determine the order in which processes will be terminated. e. If P1 makes the additional request (0 2 1 0), can this request be granted? Why or why not