Question: Question 3 Provide a regular expression defining a language M over the alphabet E = {a b} such that all words in the language have

Question 3 Provide a regular expression defining a language M over

Question 3 Provide a regular expression defining a language M over the alphabet E = {a b} such that all words in the language have exactly three b's or four b's, no less and no more. Thus M would contain words like bbb, bbbb, abbba, abababb and ababababa. Words like abbbabb, abbaa, and aabaa would not be in M

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