Question: A . Build a regular expression for the following language { w : w is not empty and ends with a contiguous set of an

A. Build a regular expression for the following language {w : w is not empty and ends with a contiguous set of an even number of 0s}.
B. Describe the language of the following regular expression: \Sigma +
C. Describe the language of the following regular expression: (1\cup empty string)(0\cup empty string)

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