1) For RSA, the following quantities are used: n, p, q, e, and d. What is the meaning of each? Indicate which are secret, and which are public. 2) For simplified DES, suppose that the message in round i is (Li,Ri). What is L i+1 ? 3) For simplified DES, define the expander function. A graph showing how the input bits are matched to the output bits is sufficient.