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This is not a programming assignment. Write code or pseudocode 1. Given an array A, return a list that has those elements of A that occur most often, in the order of their first appearance in A. Solve the problem using hash tables in expected time of O(n) For example, if A= {2,6,3,4,5,4,6,3,5,4,5,6). mostOften (A) returns {6,4). Both elements appear 3 times in A, more often than the other elements, and the first occurrence of 6 in A is before the first occurrence of 4 Analyze the expected running time of the algorithm. Optional problem for extra credit: 2. Given an array A of integers, find the length of a longest streak of consecutive integers that occur in A (not necessarily contiguously). Solve the problem using hash tables in expected time of O(n). For example, if A -11,7,9,4,1,7,4,8,7,1), then longestStreak (A) returns 3, corresponding to the streak (7,8,9 of consecutive integers that occurs somewhere in A Explain why the expected running time of your algorithm is O(n). This is not a programming assignment. Write code or pseudocode 1. Given an array A, return a list that has those elements of A that occur most often, in the order of their first appearance in A. Solve the problem using hash tables in expected time of O(n) For example, if A= {2,6,3,4,5,4,6,3,5,4,5,6). mostOften (A) returns {6,4). Both elements appear 3 times in A, more often than the other elements, and the first occurrence of 6 in A is before the first occurrence of 4 Analyze the expected running time of the algorithm. Optional problem for extra credit: 2. Given an array A of integers, find the length of a longest streak of consecutive integers that occur in A (not necessarily contiguously). Solve the problem using hash tables in expected time of O(n). For example, if A -11,7,9,4,1,7,4,8,7,1), then longestStreak (A) returns 3, corresponding to the streak (7,8,9 of consecutive integers that occurs somewhere in A Explain why the expected running time of your algorithm is O(n)