QUESTION 2. The pieces of code below run on the five-stage pipelined datapath. For each piece of code, answer the following Part a) Without forwarding, insert the necessary number of 'nops' for the code to execute correctly Part b) With the forwarding unit available (it forwards MEMEX and WBEX), show how the code will execute. Mention the data that's forwarded between the stages. Use nops' only when necessary. Code 1: and to, t1, t2 or t3, t0, t4 Code 2: add t1, t2, t3 sub t4, t5, t6 or t7, t1, t4 Code 3: lw t0, 12 (s0) sub s0, sl, to