Question: 3 marks : We are given an array that contains N numbers. We want to determine if there are two numbers whose sum equals a

3 marks : We are given an array that contains N numbers. We want to determine if there are two numbers whosesum equals a given number K. For instance, if the input is 8,4,1,6 and K is 10, then the answer is yes(4 and 6). A number may be used twice. Do the following:
1. Give an O(N2) algorithm to solve this problem.
2. Give an O(N logN) algorithm to solve this problem. (Hint: Sort the items first. After that is done,you can solve the problem in linear time.)

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