Calculate the size of the four inter stage registers in the attached pipeline.

IF/ID

ID/EX

EX/MEM

MEM/WB

From the following diagram.

PCSrc D/EX WB EXMEM ControlM WB MEMWB EX IF/ID ShiftAdd Add left 2 4 result Branch ALUSrc Read register 1 PC Address Read data 1 Zero ALU ALU Read Instruction memory register 2 Write register Write Registers Read data 2 resu data Data memory data Write data Instruction (15-01 16 Sign Sign 32 extend 6 ALU control MemRead Instruction [20-16] ALUOp Instruction [15-11] RegDst