In Java

1. Write a method that converts a decimal integer to a hexadecimal string. public static String dec2hex (int n) { } for n = 183, return value => B6 2. Write a method that returns a list of factors of a number. public static int[] listofFactors (int n) { } for n = 16, it returns {1, 2, 4, 8, 16} 3. Write a method that returns an amount of currency in words. Assume the amount