public static boolean contains (int[] arr, int a) [Question 4] Write a Java program to test if an array contains a specific value. This contains method receives an array of integers and integer as input, then determines whether this integer exists in the array or not. You can assume that the array is not empty and contains at least 1 one element. For example: if arr = {3, 6} and a=4 then return false if arr = { 1, 1, 1} and a =1 then return true public static int[] reverseof(int[] inputarray) [Question 6] This method reverseOf received an array of integers, then return the input array in reverse element order. You can assume that the array is not empty and contains at least 1 one element. You are forbidden to use any library class, e.g., Arrays.sort. For example: if inputarray = { 4, 2, 5} then return {5, 2, 4} public static int contains1(double x, Range range) [Question 7] Determine if a value x is strictly inside the given Range. A value exactly at the minimum or maximum of the range is considered outside of the range. Parameters: X - a value range - a Range to check Returns: the value 1 if x is strictly inside the given Range, and otherwise