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1. Suppose that f is defined by the following table: D E 65 66 67 68 69 70 71 72 73 74 75 7677 O

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1. Suppose that f is defined by the following table: D E 65 66 67 68 69 70 71 72 73 74 75 7677 O PQRS T UVWXYZ 79 80 81 8283 8485 8687 888990 78 Space 32 a) Decode the following message: Encoding Function: y-8x -31 Encoded Message: 53321 26233 68625 55425 67801 26113 66153 62969 26281 63849 65825 63857 52577 67753 62921 Encoding Function: y 3x+6x+15 Encoded Message: 186283212 32235864 191184879 144199479 210170712 138027279 146370687 208316679 Please show all the steps including decoding function, decoded message and the original text of message (20 marks)

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