Polymorphism - General Questions

Can a static method be virtual?

Compile-time polymorphism in C# is achieved with:

Method overloading is resolved at:

Can overloads differ only by return type?

What is the output of the following program?

Console.WriteLine(Area(3) + " " + Area(2, 5));
static int Area(int s) => s * s;
static int Area(int l, int b) => l * b;