Problem 7 (Total: 10 pts) bea $s2, $s3, DOREMI add $t4, $t5, $s2 DOREMI: sub $t4, $t5, $t4 * 2 pts) Write comments to the right of every instruction above explaining its function 4 pts) Give the contents of $t4 after the above code is executed given that the initial values of registers are: $s2 = 40, $s3 = 40, $t4 = 30, Show all the work and explanations $t5 = 120 - 4 pts) Give the contents of $t4 after the above code is executed given that the initial values of registers are: $s2 = 40, Show all the work and explanations $s3 = 20, $t4 = 30, $t5 = 120