The MIPS architecture supports byte and halfword (16-bit) memory transfer operations. The instructions are load byte (lb), load byte unsigned (lbu), store byte (sb), load halfword (lh), load halfword unsigned (lhu) and store halfword (sh).

_ Code: char a, b; //8-bit variables (a @ address 100) (b @ address 200)

_ Part a) Assuming 8-bit operations are supported (lb, lbu, sb), write a MIPS code that swaps the variables a and b.

_ Part b) If MIPS doesnt support byte and halfword operations, then we can only use load word (lw) and store word (sw), which are 32-bit operations. Accordingly, rewrite the code above using only (lw, sw) as memory transfer instructions.