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10. Find CFGs for these languages: (i) All words that start with an a or are of the form a"b where n 1,2,3,... (ii) All words that have an equal number of a's and b's or are of the form a b' where n 1,2,3,... (ii) All words of the form a ba, where x, y, z -1,2,3,.. and x +z y - {abba, aabbba, abbbaa, aabbbbaa, ...^