Question $3(20$ points$)$: Let's see how forwarding solves hazards in the

pipleline. Assume that the register file can perform a write operation and up

to two read operations in one cycle.

$Iw$ $$s5,20($$$s3)$

$Iw$ $$s6,0($$$s5)$

add $$2,$ $$s0,$ $$s4$

sub $$4,$$$s3,$$$s2$

$sw$ $$s6,0($$$s4)$

and $$s7$ $$s6,$ $$s5$

A$)$ Assume no forwarding, show the resulting execution sequence on the $5-$

stage pipeline.

B$)$ Assume full forwarding, show the resulting execution sequence on the $5-$

stage pipeline.