Question: 18. (5 pts) A message has been encrypted using the function f(x) = (x + 4) mod 26. If the message in coded form is

18. (5 pts) A message has been encrypted using the function

18. (5 pts) A message has been encrypted using the function f(x) = (x + 4) mod 26. If the message in coded form is FVEHC, decode the message

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