JAVA In order to compute a power of two, you can take the next-lower power and double it. For example, if you want to compute 2^11 and you know that 2^10=1024, then 2^11=2×1024=2048. Write a recursive method public static int pow2(int n) where n is the exponent, that is based on this observation. If the exponent is negative, return -1. import java.util.Scanner; public class PowerTwo {    public static int pow2(int n)    {       /*  code goes here */    }        public static void main(String[] args)    {       Scanner in = new Scanner(System.in);       while (in.hasNextInt())       {          int exponent = in.nextInt();          System.out.println(pow2(exponent));       }          } }

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