4) Write a method that takes an array of integers as an argument and returns the array in reverse order. Test the program by calling the method from the main method. For example array 1121 31- 1312| 1 5) Write a method that returns "true" if an integer number is a power of 2 and false otherwise (do not use Math class methods). Test the program by calling the method from the main method. For example, it should return true for numbers: 2, 4, 8, 16, 32, 64,. 6) Write a method to remove all vowels (a, e, i, o, u, A, E,I O U) from a string. Test the program by calling the method from the main method. For example, "Hello" - "HI