1(a). The following ciphertext was produced by an affine cipher modulo 26:CRVVBO. The plain-tex starts with il. Decrypt the message. 1(b). Suppose you encrypt using an affine cipher, then encrypt the encryption using another affine cipher (both working modulo 26).Is there any advantage to doing this rather than using a single Affine cipher? Why or why not? 1(c). Suppose that you want to encrypt a message using an affine cipher. You let a = 0, b = 1, etc., but you also include? = 26. Therefore you have 27 symbols to encrypt and your affine cipher is given by ax + b (mod 27). (a) Enumerate all choices for aZ27 that allow you to decrypt. (b) Suppose you try to use a= 12 and b = 3. Find two plaintext letters that encrypt to the same Ciphertext letter.