The MIPS conditional branch instructions use PC-relative addressing. The address space of a process is divided into several segments. Local variables are usually but not always allocated on the runtime stack. Try to write only a few instructions for each part, and write a comment if you think your answer needs some explanation. You may use pseudo-instructions.
Short answers are preferred.
The following is correct compiler output with comments added. You can just make changes here. Only one student noticed the typographical error in the struct definition. The struct does not have a name either, but that's actually acceptable even if it makes the declaration pointless. The first byte of b comes after the last byte of a, though maybe not immediately after if padding is required for alignment of the double.