Which two code fragments, when inserted at // insert code here, enable the code to compile and print 12?

AD:
public class Calc extends Mid{
public static void main(String[] args) {
int n1 = 22, n2 = 2;
// insert code here
Calc c = new Calc();
int n3 = c.findMid(n1, n2);
//int n3 = super.findMid(n1, n3);
//Calc c = new Mid();
//int n3 = c.findMid(n1, n2);
Mid m1 = new Calc();
n3 = m1.findMid(n1, n2);
//int n3 = Calc.findMid(n1, n2);
System.out.print(n3);
}

}
public class Mid {
public int findMid(int n1, int n2) {
return (n1 + n2) / 2;
}
}