Consider two instruction sequences:
a. SW R16,-100(R6)
LW R4, 8(R16)
ADD R5,R4,R4
b. OR R1,R2,R3
OR R2,R1,R3
OR R1,R1,R2
Add NOP instructions to this code to eliminate hazards if there is ALU-ALU forwarding only (no forwarding from the MEM to the EX stage).