7. This problem will walk through a single step of AES round key generation, in which you will generate round word W4 from W0 and W3. Your key will be based on the last 4 digits of your Banner ID. Specifically: - W0 will be the first 4 digits of your Banner ID repeated once. - W3 will be the last 4 digits of your Banner ID repeated once. For example, if your ID were 00123456 , then W0 would be 00120012 and W3 would be 34563456 . As shown in lecture, this means that you will need to: I 1. Run your W4 through RotWord (doing a circular left shift). 2. Run the result through SubWord using the AES S-box. You will probably need to convert that result to binary for the next two stages. 3. XOR the result with the round constant (0001 000000000000 for this round). 4. XOR the result with your value of W0. You are required to show your work at each stage