Question
Algorithms, Languages and Regular Expression

Transcribed Image Text:For each of the following decision problem¹ P:
i. Describe a way to represent the inputs as strings (the alphabet doesn't have to be
binary).
ii. Describe a regular expression that represents the language L := {w | P(w) = 1} and
briefly explain why the regular expression is correct.
Note: You don't have to provide the exact regular expression for part (ii). Describing how you
would formulate the regular expression is sufficient, given that the exact regular expression
could indeed be obtained by following your solution.
a Input: A binary number
Output: TRUE if the input is divisible by 4, FALSE otherwise
b Input: A complete and valid tic-tac-toe board filled with O and X
Output: TRUE if the winner is O, FALSE otherwise
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