Q3. Work out and diagram the optimal pipeline schedule using forwarding from EX or MEM stages to any other stage, then compute the pipeline CPI for the following MIPS assembly language code: lw $t1, 120 ($t0) lw $t0, 80 ($t1) add $t0,$t0,$t1 sw $t0, 90 ($tiy sub ti, $t0,$t1 sw $t1, 90($t0) [5M)