Question 3 : Suppose data forwarding is NOT implemented in a pipelined MIPS processor, for each of the following code sequence, please identify all the data hazards and resolve these hazards by reordering the instructions (Nops can be added only if they are necessary!).

A) add $t0, $s0, $s1

sub $t1, $t0, $s2

lw $s0, -12($a0)

sub $s5, $s0, $s1

B) lw $t0, 0($s5)

addi $s5, $s5, 4

add $t0, $s3, $t0

sw $t0, 0($s5)

add $t3, $t2, $s5

add $t2, $t3, $t2