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For each of the following regular expressions, give 2 examples of strings that are in the...

For each of the following regular expressions, give 2 examples of strings that are in the language described by the regular expression, and 2 examples of strings that are not in that language. In all cases the alphabet is {a, b}.

  1. ab*ba*
  2. (a ∪ ε)b*
  3. (a ∪ b)ε*(aa ∪ bb)
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