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Q-4: Show your alphabet index values (e.g. if a = 0, b = 1 or a = 1, b = 2 etc.) and sample calculations. Encrypt the following text and provide the result and calculations. Do not encrypt non-alphabetic characters, just pass them through (e.g. and punctuation) and do not consume the encryption-key letter for skipped letters. Treat uppercase as lowercase. Show the PLAYFAIR matrix and three digraph boxes for encryption on it. The Turing halting problem.

(i) Encrypt with Caesar(-5)

(ii) Encrypt with Vignere using the keyword kennesawstate

(iii) Build the Playfair Matrix using the keyword kennesawstate, merge the two characters i/j, insert X into aligned duplicates values. Insert Y into duplicated X values. Pad unpaired letters with the letter Z.