The figure below shows the process traces for three processes: X, Y and Z. Assuming that OS only allows a process to continue execution for a maximum of four instructions cycle before a time out occurs. 7210 7211 7213 7214 7215 7216 7217 (I/O request) 10001 10002 10003 10004 10005 10006 10007 10008 10009 10010 10011 (I/O request) 15111 15112 15113 15114 15116 15117 (1/O request) Trace of Process X Trace of Process Y Trace of Process Z 1. Show the execution of these three processes from the processor point of view. [3 marks] 2. What happens to the system when all this process execute their last instruction? [2 marks] 3. How swapping can help to solve the problem in (b)? [4 marks]