] Consider the following sequence of instructions in a pipeline operation. Assume there are Instruction number is added in front of each instruction.

lw r1, 0(r1)

lw r1, 0(r1)

sll r2, r1, 2

I4 lw r1, 0(r2)

addi r2, r2, 1

I6 lw r1, 0(r1)

or r1, r2, r1

(10 points) Specify the data hazards by describing the data dependencies between the instructions. e.g., r1 in Instruction x is dependent on the r1 in Instruction y. Assume there are no stalls or data forward in doing this analysis.

(10 points) If we are able to detect data hazard (i.e., stall the execution) and forward register value, state the source and the destination of this pipeline register forwarding. e.g., forward r1 value in EX/MEM or MEM/WB pipeline register from Instruction x to Instruction y.

Remember to stall the execution when appropriate.