Question: Create a regular expression to define each of these languages. Over the alphabet {a, b}, all strings with an even number of bs. Over the

Create a regular expression to define each of these languages.

  1. Over the alphabet {a, b}, all strings with an even number of bs.

  2. Over the alphabet {a, b}, all strings that contain at least two as and at most one b.

  3. Over the alphabet {a, b}, all strings exactly two characters long.

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