4. Methods. Write a static method to a. Determine if two numbers are within a given tolerance b. Return the minimum value stored in an array c. Return the index where the maximum value is stored in an array d. Return how many times a given value occurs in an array. e. Return the arithmetic mean (average) of an input array. f. Return the number of values greater than a given value g. Change the length of an array. h. Sum the rows of a 2-D array. i. Search for a value in an array and return it's index. j. Return main diagonal sum; or, minor diagonal sum of a 2-D array k. Insert (or delete) and item in an array 1. Reverse an array m. etc..