Question: 1. Find (as simple as possible) an unambiguous regular grammar which generates the following language over A = {a,b}: L = {x | num(a,

1. Find (as simple as possible) an unambiguous regular grammar which generates the following language over A = {a,b}: L = {x | num(a, x) is even A each b is followed by at least one a} where num(a,x) denotes the number of occurrences of symbol a in the string x. Illustrate your grammar by a derivation of a nontrivial string.

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