Computer Science 1. Suppose that we have a 128-bit AES system: • 128-bit AES key; 2B7E151628AED2A6ABF7158809CF4F3C (in hexadecimal notation) • Plaintext: 3243F6A8885A308D313198A2E0370734 (in hexadecimal notation) a) What is the key for the first round in the 10-round AES? (Hint: W0 - W3)

Audio CDs encode the music at 44,000 Hz with 16-bit samples.Would it make sense to produce higher-quality audio bysampling at 88,000 Hz with 16-bit samples? What about 44,000Hz with 24-bit samples?

QUESTION 9 What is the hexadecimal representation of the memory variable location at address 003FBA03H in the Little Endian format from the 32-bit binary quantity represented by 10100111 110111100101101100001100b? Address in hexadecimal format 003FBA00H 003FBA01H 003FBA02H 003FBA03H 003FBA04H Data in hexadecimal format O a. The hexadecimal representation for the variable located at memory address 003FBA03 is A8. Ob. The hexadecimal representation for the variable located at memory address 003FBA03 is A5. OC. The hexadecimal representation for the variable located at memory address 003FBA03 is A3. Od. The hexadecimal representation for the variable located at memory address 003FBA03 is A7.

What decimal value does the 8-bit binary number 10010110 have if it is represented using Excess-M  representation? a)  If high-order interleaving is used, where would address 37 (base 10) be located? b)  If low-order interleaving is used, where would address 28 (base 10) be located