Given an array as follows long [] [] nums = {{1,2,3,4,5}, {6,7,8,9}, {10,11,12,13,14,15}, {16,17,18,19,20}, {21,22,23,24,25}}; build the following methods: 1) calctotal: the method should accept a two-dimensional array as an argument and return the total of all the values in the array. 2) calcaverage: the method should accept a two-dimensional array as an argument and return the average of all the values in the array. 3) calcrowaverage: the method should accept two parameters: 1) a two-dimensional array as an argument and 2) an integer that represents a row number for calculations. return the average of all the values in that row in the array.