Question: Question 4 Give a context - free grammar for each of the following languages over = { a , b , c } . 1

Question 4
Give a context-free grammar for each of the following languages over ={a, b, c}.
1.{anb2n : n 0}.
2.{aibj ck : i + j = k}.
3. Strings in which the number of as is double the number of bs.

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