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Question B8 Within computer science, what do we mean by a string? a) b) A string is a sequence of symbols. A string is a set of symbols. A string is a sequence of digits. A string is a sequence of ascii code. c) d) Question B9 If a language A is {a} and another language B is {1,1}, what is A.B3? a) b) A.B3 = {A, a, a1, a2, a3} A.B = {a, 1, 11, 111, 2, 3} A.B3 = {a, a1, a11, a111} A.BP = {a, 1, 1, 11, 111} c) d)