Question: Give a a regular expression for the language L6 = {w | w contains an even number of a's} where = {a, b}. Give a

Give a a regular expression for the language L6 = {w | w contains an even number of a's} where = {a, b}.

Give a a regular expression for the language L7 = {w | w does not contain the substring bba} where = {a, b}.

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