5. a. Let a, b, c, d, e, f be integers (mod 26). Consider the following combination of the Hill and affine ciphers: represent a block of plaintext as a pair (,y) (mod 26). The corresponding ciphertext (u, v) is (z, y) ( ,) + (e, f) (u, u) (mod 26). Encrypt the plaintext here using the values below: (z, y) (S 1 )4(8, 11) (u,u) (mod 26) = 5. a. Let a, b, c, d, e, f be integers (mod 26). Consider the following combination of the Hill and affine ciphers: represent a block of plaintext as a pair (,y) (mod 26). The corresponding ciphertext (u, v) is (z, y) ( ,) + (e, f) (u, u) (mod 26). Encrypt the plaintext here using the values below: (z, y) (S 1 )4(8, 11) (u,u) (mod 26) =