Examine the difficulty of adding a proposed lwi.d rd$,$ rs$1,$ rs$2($Load With Increment$)$ instruction to RISC$-$V$.$ Interpretation: Reg$[$rd$]=$Mem$[$ Reg$[$rs$1]+$Reg$[$rs$2]].$ The existing datapath is the same as the one used in Q$\mathrm{.}2$ a$.$ C$.$ Which new functional blocks $($if any$)$ do we need for this instruction? b$.$ Which existing functional blocks $($if any$)$ require modification? Which new data paths $($if any$)$ do we need for this instruction? d$.$ What new signals do we need $($if any$)$ from the control unit to support this instruction? Draw out any new datapath or functional block or modify the existing functional block in the diagram provided below. Also indicate the addition of new control signals $($if any$)$ and their values as well as the values of the existing control signals $($shown in blue$)$ You may draw a new datapth figure if it becomes too untidy to re$-$adjust the figure below. Make sure your work is neat or else the graders will have difficulty grading e$.$ PCSrc O ES M Add Add Sum Shift left $1$ ALUSrc ALU operation PC Read address Read register $1$ Read Read data $1$ register $2$ Registers Read Write data $2$ register MemWrite MemtoReg Zero Instruction ALU ALU Address Read data M result Instruction memory o $--$ Write data Write data Data memory RegWrite $3264$ MemRead Imm Gen