Question 2 To make a possible secure communication between sender and receiver, both have decided that they will use two substitutions at the same time. For example, there is a plain text (P), the sender feeds this into Ceaser Cipher substitution and gets the cipher text, and then he feeds cipher text into another substitution where the key is 2 3 4 today. When the receiver gets the message, he gets the following thing: hutuaajx What is the plain text