If Sample class has a Length property with get and set accessors then which of the following statements will work correctly? 1 Sample.Length = 20; 2 Sample m = new Sample(); m.Length = 10; 3 Console.WriteLine(Sample.Length); 4 Sample m = n

If Sample class has a Length property with get and set accessors then which of the following statements will work correctly?

1 Sample.Length = 20;

2 Sample m = new Sample();
m.Length = 10;

3 Console.WriteLine(Sample.Length);

4 Sample m = new Sample();
int len;
len = m.Length;

5 Sample m = new Sample();
m.Length = m.Length + 20;