PROJECT: JAVA
Write a method, insertAt, that takes four parameters: an array of integers; the length of the array; an integer, say, insertItem; and an integer, say, index. The method inserts insertItem in the array at the position specified by index. If index is out of range, output an appropriate message. (Note that index must be between 0 and arraySize, that is, 0 < index < arraySize.) You may assume that the array is unsorted.