2) Part A: The input to the expansion matrix E in DES, expressed in hexadecimal is A39047FC. What are the first 24 bits of output? Please express your answer in bits and put a little space between each group of 6 bits. Use words to explain how you arrived at the answer so that the grader can verify that the answer is correct for the right reason. Part B: Consider a portion of a single DES round where the last 24 bits of input (expressed in HEX) to S boxes S5, S6, S7, S8 is 6B9. What are the 16 bits of output from those 4 S- boxes? Express your result in binary. (Note: Partial credit on this question will be limited for obvious reasons, so double check your answers.)