We learned how to encode and decode using affine ciphers. You are given the following string to encrypt: good luck After encrypting, this is the string: mkkd bcay Your encryption function is h(x) = (ax +46) mod 26 x is the letter to encode h(x) is the encoded letter a is a coefficient What is the value of a such that osa s 26 ? 1) 5 O2) 9 3) 21 0 4 11 5) 25 1) 5 5 2) 9 3) 21 4) 11 5) 25 6) 23 07) 15 8) 17 9) 3 10) 19 11) 7