As in a pipelining hazard in assembly language. Indicate any hazards that are in these instructions (i.e. data hazard, control hazard, or structure hazard)

We have the following sequence of instructions lw r4, 4($s1) or r1,r2,r3 or r2,r1,r4 or r1,r1,r2 1) Indicate any hazards and what the hazard types are