S box has 8 boxes. The following table is the selection matrix of S. box in DES algorithm. If the input is 101001, what is the output result? 0 1 2 3 4 5 6 7 8 9 11 1 1 1 1 0 1 2 3 4 15 5 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13 Question: 3 Suppose (p, q) (3,19), let Alice and Bob negotiate the key using Diffie-Hellman. Alice c hooses the private key as 15, and Bob chooses the private key as 17. Write down the pr ocess of key negotiation, and what is the shared session key they negotiate?