### A good answer might be:

    beq    rs,$0,label          # branch to label if register rs==0

# Unconditional Branch Instruction

The pseudocomputer has an unconditional branch instruction that always causes a branch. The mnemonic for the instruction is `b`:

    b     label       # branch to label
                      # (pseudoinstruction)

This instruction behaves like the jump instruction: it unconditionally loads the PC with the address specified by `label`. Unlike the jump instruction, the branch target `label` must be relatively close to the branch instruction, as is true with all branch instructions. The 32-bit address is computed using a 16 bit offset in the instruction and the current value of the PC.

### QUESTION 3:

The extended assembler implements the `b` instruction using the `beq` instruction. Fill in the blanks to show what it does:

    b  label     ==     beq  _____,_____,offset

Offset is the 16-bit offset that is added to the PC to calculate `label` (if possible).