in javaWhich of the following are acceptable values to pass to Font.font() code example

Example: Which of the method calls and field accesses (shown in underlined bold) in UseSample.java and Sample.java are legal in Java?

public class UseSample {
    public static void main(String [] args) {
        Sample s1 = new Sample(1, 2);
        Sample s2 = new Sample(3, 4);                
        Sample.ourData = Sample.method1(s2) * s2.method3(s1);
                
        s1.myData = this.ourData + counter;
                
        s2.myInfo = s1.method2(s1) * s2.ourData;
                
        Sample.counter += Sample.method4(s1) + 7;
    }
}