4. Assume the following two MIPS codes are given to you. Answer the following questions based on the assumptions that values of 10, 20, 30, and 40 are assigned to registers $30, $s1, $s2, $s3, and $s4 respectively. Assume that the base address of the array B is in registers $s6 and has the value of 256. Code 1: add $30, $s0, $sl add $s0, $s3, $s2 add $50, $s1, $s3 You're also given the following memory allocation with saved values: 0 ... Code 2: addi $36, $s6, -20 add $s6, $s6, $sl lw $50, 8 ($s6) 10 35 12 43 18 256 .. a. For the given MIPS instructions above, what are the corresponding C codes? c. b. For each code given above, find the value saved in register $80 at the end of execution. Comment on the performance of the compiler based on the corresponding MIPS code output. Should you continue to use the same compiler for your other programs? Or should you look for another one? Why? Explain your answer in detail.