Question: Find all hazards in this instruction sequence for a 5 - stage pipeline with and then without forwarding. Hint: Please fill in the gray box

Find all hazards in this instruction sequence for a 5-stage pipeline with and
then without forwarding.
Hint: Please fill in the gray box with an answer like "($1) I1 to I3". Please find all
the hazards. In addition, not every gray box needs to be filled in.
I1: lw $1,40($2)
I2: add $2, $3, $3
I3: add $1, $1, $2
I4: sw $1,20($2)

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