ProblemHackerRank detailed problem description can be found here. Inputs & Outputs/* input {array} arr - 6x6 2d array output {number} - maximum hourglass sum */Test Case let arr = [ [1, 1, 1, 0, 0, 0], [0, 1, 0, 0, 0, 0], [1, 1, 1, 0, 0, 0], [0, 0, 2, 4,