5. Consider the in-order-issue/in-order-completion" execution sequence shown in Fig. Q5 below: (a) Identify the most likely reason why 12 could not enter the execute stage until the fourth cycle. Will in-order-issue/out-of-order-completion or out-of-order-issue!"out-of- order-completion" fix this? If so, which one? (b) Identify the reason why 16 could not enter the write stage until the nineth cycle. Will "in-order-issue/out-of-order-completion" or "out-of-order-issue/"out-of-order- completion" fix this? If so, which one? Execute Write Decode 11 12 12 11 11 Cycle 1 2 3 4 5 6 12 12 14 16 16 13 15 15 14 13 13 11 12 15 15 16 13 14 7 8 15 16 9 Fig. 25. An In-Order-Issue, In-Order-Completion Execution Sequence. (20 marks)