000 RSD 3. AES consists of four functions in three layers. Which of the four functions are primarily for confusion and which are primarily for diffusion? Justify your answer. Which of the three layers are for confusion and which are for diffusion? Justify your answer. 4. Draw diagrams to illustrate encryption and decryption in CBC mode. Note that these diagrams are independent of the particular block cipher that is used. 666 5. Suppose that Bob's knapsack private key consists of {1, 2, 4, 10, 20, 40} along with the multiplier m = 31 and modulus n = 110. Find general Knapsack (GK)? Encrypt the message M= 46 ? Decrypt the message C=197