Write a method called "sigNum" that returns information about the SIGN of the input parameter 'num'. There are three possible signs for numbers. Integers can be positive, negative, or unsigned. Zero is the only unsigned integer. To indicate a positive sign, return 1. To indicate a negative sign, return -1. To indicate unsigned, return 0. Look at the test date for examples. You may NOT use the "Math" library or any methods from that library. Of course you MAY use any normal math operations.