(b) The affine cipher E is given by E(x) = 17x - 3 (mod 26). The conversion table for letters and numbers is shown below. A C E F H J K M 2 3 4 8. 9. 10 11 12 Q R T U V W Y 13 14 15 16 17 18 19 20 21 22 23 24 25 (i) Show that -3 is a multiplicative inverse of 17 modulo 26. (ii) Suppose that you receive the enciphered message 8, 23, 10, 11. Decipher the message and deduce the word that was sent.

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