For each code sequence below, state whether it must stall, can avoid stalls using only forwarding, or can execute without stalling or forwarding.

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Sequence 1 Inst0,0(3t) add $t1, $t0, sto Sequence 2 add $t1, $t0, sto addi $t2, $t0, #5 addi St4, $t1, #5 Sequence 3 addi $t1, $t0, #1 addi $t2, $t0, #2 addi $t3, $t0, #2 addi $t3, $t0, #4 addi $t5, $t0, #5