computer organization

Q3. In this exercise refer to the following fragment of MIPS code: sw r16,12(r6) lw r16,8(r6) beq r5, r4,Label # Assume r5!=r4 add r5,rl, r4 sub r6,r5,r4 a. Investigate the operation of this segment by the clock cycles Drawing. b. What can we do to best solve any Hazards (if exist). C. Can you rearrange the instructions to avoid hazards