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Suppose we are given two n-element sorted sequences a and b that should not be viewed as sets (that is, a and b may contain duplicate entries). (a) describe an o(n)-time algorithm^2 for computing a sequence representing the set a intersection b. (b) if the sequences a and b are instead unsorted, what is asymptotic time complexity of the most efficient algorithm that you can construct that computes a intersection b? describe this algorithm.

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