Let C be the language of all valid delimited comment strings. A member of C must begin with /# and end with #/ but have no intervening #/. For simplicity, we’ll say that the comments themselves are wri en with only the symbols a and b; hence the alphabet of C is ∑ = {a, b, /, #}. 1. Give DFA that recognizes C. 2. Give a regular expression that generates C.

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XOR function or exclusive OR function was introduced in Excel 2013. This function is available under excel logical functions. For the given statement, the XOR function will return true only when either of the statements is true. It returns false when both the statements are true or when both the statements are false.