Write an interface named "PlayString" which has one method called "StringBuider backwardsString(String s)". Write one class that implements the PlayString interface such that the backwardsString method return the backwards of the given String s. Please also write a small main method to test your class. interface PlayString { StringBuilder backwardsString(String s); } The execution sample is provided as follows: Input one String: I love Singapore backward is: eropagnis evol I Input one String: Jave is so awesome! backward is: !emosewa os si ava]