The following instruction sequence is run on the $5-$stage pipeline we

discuss in our class.

$($a$)[7\%]$ If forwarding is not used, how many extra cycles will be incurred

for the instruction sequence executed? Show your reasoning and

calculation.

$($b$)[7\%]$ Suppose forwarding is used for reducing hazard impact. How

many extra cycles will be incurred for the instruction sequence

executed? Show your reasoning and calculation.