Which of the following is the correct implementation of the interface given below? interface IMyInterface { double MyFun(Single i); }

• class MyClass { double MyFun(Single i) as IMyInterface.MyFun { // Some code } }
• class MyClass { MyFun (Single i) As Double { // Some code } }
• class MyClass: implements IMyInterface { double fun(Single si) implements IMyInterface.MyFun() { //Some code } }
• class MyClass: IMyInterface { double IMyInterface.MyFun(Single i) { // Some code } }