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BJP5 Self-Check 7.11: average

Language/Type: Java arrays
Author: Marty Stepp (on 2019/09/19)

Write a method called average that computes the average (arithmetic mean) of all elements in an array of integers and returns the answer as a double. For example, if the array passed contains the values [1, -2, 4, -4, 9, -6, 16, -8, 25, -10], the calculated average should be 2.5. Your method accepts an array of integers as its parameter and returns the average. You may assume that the array contains at least one element. Your method should not modify the elements of the array.

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This is a method problem. Write a Java method as described. Do not write a complete program or class; just the method(s) above.

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