1. An affine cipher using an alphabet of size n maps the letters to integers from 0 to n-1 This integer is the mapped to an integer representing a ciphertext letter. The encryption function, E(x) (axb) mod n. The key (a,b) are co-prime. If a middle man (MM) intercepts the cipher and finds out that the most frequent letter of the ciphertext is "M" and the second most common is "G". Show that the MM can break the code (i.e. solve for the key)