Question: 1. Given a regular language named D, if some finite set of strings are added to it the resulting language will be regular. 2. If

1. Given a regular language named D, if some finite set of strings are added to it the resulting language will be regular.

2. If D is a non-regular language and D' is a language when D'D then D' must be non-regular

3. Given a regular language D where a finite set of strings are removed, the result is a regular language.

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