Q5) Suppose Trudy gets a ciphertext C that was sent from Alice to Bob. She only knows C is encrypted using a one-time pad cipher. But she doesn't know the pad K that's used to encrypt, and of course, she doesn't know the plaintext. However, she can make Bob believe the plaintext is P' (a text that Trudy chooses) by sending Bob a different pad K '. I. (1 pt) Give the equation that Trudy will use to compute K' (hint: Trudy needs to use P' and C). II. (2 pts) Prove that when Bob decrypts C using K ', he will get P