2. Refer to the following sequence of instructions, and assume that it is executed on a 5-stage pipelined datapath. add r5, r2, r1 lw r3, 4(r5) lw r2, 0(r2) or r3, r5, r3 sw r3, 0(r5) a. If there is no forwarding or hazard detection, insert nops to ensure correct execution. [3 pts] b. If the processor has forwarding, but we forgot to implement the hazard detection unit, what happens when this code executes? [2 pts]