Question: Encrypt the message DO NOT PASS GO by translating the letters into numbers, applying the given encryption function, and then translating the numbers back into

Encrypt the message DO NOT PASS GO by translating the letters into numbers, applying the given encryption function, and then translating the numbers back into letters.
a) f (p) = (p + 3) mod 26 (the Caesar cipher)
b) f (p) = (p + 13) mod 26
c) f (p) = (3p + 7) mod 26

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