1. A) Rewrite the following program fragment to take advantage of register plus immediate addressing mode. Assume that no register values are used outside of the program fragment and that the code fragment will execute on a load-store processor.

ADD r2, r3, #8

LD r4, (r2)

ADD r1, r4, r8

ADD r5, r3, #16

LD r6, (r5)

MUL r7, r1, r6

ADD r9, r3, #24

ST (r9), r7

B) Rewrite the program from Problem 5.6 to take advantage of post incrementing addressing mode. The value in r3 is allowed to be different at the end of the program from the value at the beginning. You may not use register plus immediate addressing mode anywhere in the program, but you may use register addressing mode.