number of cycles saved using operand forwarding

Question

Answer 1

No of cycles without operand forwarding 14 cycles

No of cycles with operand forwarding 8 cycles

So no. of cycles saved with operand forwarding (14-8) =6 cycles

Comments

answer given by madeE is attached , can someone please confirm which one is correct and the concept also with reference to this question???

TIA

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@srestha goel load is mem operation so R4 will be available on end of mem cycle i.e end of 4rth stage

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which one   is correct of the above two i too got confused

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@ srestha

I2  output is available in 4th stage then why are you inserting ID stage of I3 before it , in data forwarding