We refer to the following sequence of instructions, and asstume that it is executed on a five$-$stage pipelined datapath:

add $x5,x3,x2$

$ldx4,4(x5)$

$ldx3,0(x1)$

$orx4,x5,x4$

$sdx4,0(x5)$

a$.$ If there is no forwarding or hazard detection, insert NOPs to ensure correct execution.

b$.$ Change and$/$or rearrange the code to minimize the number of NOPs needed. You can assume register $17$ can be used to hold temporary values in your modified code.

c$.$ If the processor has forwarding: but we forgot to implement the hazard detection unit, what happens when the original code executes?