4, 16 points] Use the register and memory values in the table below for this question. Assume a 32-bit machine. Assume each of the following questions starts from the table values; that is, DO NOT use value changes from one question as propagating into future parts of the question. R4 Give the values of RI, R2, and R3 after this instruction: sub RI, R2, R3 What values will be in R1 and R3 after this instruction is executed: Iw R3, 4(RI) What values will be in R2 and R4 after this instruction is executed: addi R2, R4#8 24 a) b) c)