Complete State Diagram SO MemRead ALUSTA = 0 IorD=0 IRWrite ALUSrcB = 01 ALUOp=00 PCWrite PCSource = 00 S1 ALUSrcA=0 ALUSrcB = 11 ALUOp = 00 How many state bits are needed? start bq= Op Op = R-type 59 S2 ALUSTA = 1 ALUSrcB = 10 ALUOp = 00 Op = = 'lw' or 'sw' S6 ALUSCA = 1 ALUSrcB=00 ALUOp = 10 S8 ALUSCA= 1 ALUSrc B = 00 ALUOp = 01 PCWriteCond PCSource = 01 PCWrite PCSource = 10 SW 1W S3 S5 SZ MemRead IorD = 1 Mem Write Iord = 1 RegDst = 1 RegWrite MemtoReg = 0 S4 RegDst = 0 Reg Write MemtoReg = 1