Problem 4: Consider the following sequence of instructions and assume 5-stage pipelined datapath. add $s5, $s2, $s1 lw $2, 0 ($s2) or $s3, $s5, $s3 sw $s3, 0 ($s5) Identify any data hazards and insert nop instructions to correct for them. Re-arrange the code to eliminate as much hazards as you can and resolve the remaining by adding nop instructions. How many cycles did you save by re-arranging of the code? a) b) c)