Give context-free grammars (CFGs) that generate the following languages over {0, 1}

1. (20 points) Give context-free grammars (CFGs) that generate the following languages over 10,1): (a) A = {0"12'"O'n I n, m > 0} (b) B = {0"21"0" | k > n and n, Tn > 0}