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Q3. Consider the following grammar: [2 +2+2 = 6 Points) SAS A (AB) B (A) a) Give a leftmost derivation of the string: ((x)x)S b) Show the parse tree of leftmost derivation for the string given in part (a). c) For the following regex, draw a (totally defined) DFA: num digit+ (. digit+)? (E (+ -)? digit+)