java

1- Implement an algorithms to calculate the sum of all numbers in an array. 2- Implement an algorithm to determine if an array has all unique integer values. 3- Given an array nums. We define a running sum of an array as runningSum[i] sum(nums[0].nums[i]). Return the running sum of nums. Example 1: Input: nums = [1,2,3,4) Output: (1,3,6,10] Explanation: Running sum is obtained as follows: [1. 1+2, 1+2+3, 1+2+3+4]