a) Using decimal numbers to represent the value of each field and assuming that here labels the instruction at address 0x400020, write the MIPS machine language code for each of the following assembly language instructions:

here: lw $t0, 0($s0) bne $t0, $zero, NegNum PosNum: add $s0, $s0, $s1 j here NegNum:

Clearly indicate the instruction format (R, I, or J) used by each instruction. Note that 0x400020 = 419433610. [NOTE: if you prefer, you may write the jump address only -- as a hexadecimal number!]

b) Show the 32-bit BINARY representation of the add instruction from part (a), clearly separating the groups of bits comprising each field (opcode, rs, etc.).