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3. Suppose you have an array of n random elements. You are required to perform n...

3. Suppose you have an array of n random elements. You are required to perform n different searches on the array. What is best big-oh time for your entire task? Explain how to achieve that time.

4. Suppose you are given two sorted integer arrays int[] A and int[] B. Write a method that returns an array which contains only the common elements (elements that are present in both A and B) of these two sorted arrays. Indicate the big-Oh time of your method.

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