2)Two people, Alice and Bob are using the key sharing algorithm. They have chosen a clock size of 17 and a base of 5. Alice's private number is 4, while Bob's is 6. The first step in creating the shared key is for each party to generate a PPN based on their private number, the base and the clock size. What is Alice's PPN?

A. 4

B. 20

C. 13

D. 3