1.(afier a Stallings problem) Assume at time S, no system resources are being used except the processor and memory. Given this, consider this sequence of events: at time 5: Pl executes a command to read from disk unit 3,; at time = 15: PS's time slice expires; at time = 18: P7 executes a command to write to disk unit 3; at time = 20: P3 executes a command to read from disk unit 2; at time = 24: P5 executes a command to write on disk unit 3; at time 28: P5 is swapped out; at time 33: an interrupt occurs from disk unit 2, P3's read is complete; at time = 36: an interrupt occurs from disk unit 3, P1's read is complete, at time = 38: P8 finishes; | at time = 40: an interrupt occurs drom disk unit 3: PS's write is complete; at time = 44: P5 is swapped back in; at time = 48: an interrupt occurs from disk unit 3: P7's write is complete For each of times 16, 29 and 48, identify which state each process is in. If a process is blocked, identify the event on which it is blocked. You will only be able to indicate that a process is ready to run, since there isn't information provided to let you know if it is running as opposed to only runnable (ready to run)