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1. (16 pts total] Formal Languages. la. [4 pts] What is a formal language? 1b. [6 pts] Consider the following grammar, whose start symbol is

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1. (16 pts total] Formal Languages. la. [4 pts] What is a formal language? 1b. [6 pts] Consider the following grammar, whose start symbol is S. S + Ab A - XA | E Based on this grammar, write a derivation for the string xxxb. 1c. [6 pts] Circle the strings that lie in the formal language generated by the grammar in the previous part. bx ab xb aaaaab xxxxxb b xbxbxb

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