Question: For each of the following languages, write a regular expression that describes the language. (a) (6 pts) The set of strings that begin with ab

For each of the following languages, write a regular expression that describes the language.

(a) (6 pts) The set of strings that begin with ab and end with ba, over alphabet {a, b}. Note: the string aba is in the language.

(b) (6 pts) The set of natural numbers divisible by 5.

(c) (6 pts) The set of strings that consist of an even number of as (including none), over alphabet {a}.

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