Answer both parts otherwise don't attempt Take a look at the picture of MIPS 800Instruction DecodeRegister FetchExecuteAddress Calc.Instruction FetchMemory AccessWrite BackIFIDEXМЕМWBNext PCNext SEQ PCNext SEQ PCRS1RS2BranchtakenRegisterFileZero?PCIRMemoryALUSign ImmExtendMemoryWB Data1. For the adder on the top left corner, the top arrow is missing. What should that number be?Please explain.2. What is the purpose of the mux at the end of the WB section? Name 2 assembly codes, one eachfor each of the 2 branches. Please explain your answerMUXMEM/ WBEX / MEM/MUXMUXID / EXIF / ID

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Take a look at the picture of MIPS 800 Instruction Decode Register Fetch ID Execute Address Calc. Instruction Fetch Memory Access Write Back IF EX MEM WB Next PC Next SEQ PC Next SEQ PC RS1 RS2 Register File Branch taken Zero? IR PC Mema ALU Sign Imm Extend Memory WB Data MUX MEM/ WB EX/ MEM MUX MUX ID / EX IF / ID