Could someone please explain what is going on here and why the output is 5,4,5? [closed]

Solution for Could someone please explain what is going on here and why the output is 5,4,5? [closed]
is Given Below:

I am currently learning on scope rules but I am still stuck on how this example program works, so if someone could explain what is happening at each step when the main method is executed that would be great

Edit: also what does the s.a and the s.c mean in the last line of the code?

import comp102x.IO;

public class Scope1 {

    private int c = 1;
    private int a = 2;
    
    public int one(int a, int b) {
        c = a * 2;
        a = 3 + b;
        b = b + 1;

        IO.outputln("One: " + a + "," + b + "," + c);
        return b;
    }

    public int two(int a, int b) {
        c = one(b, a);
        this.a = a + 1;
        IO.outputln("Two: " + a + "," + b + "," + c);
        return a;
     }
   
    public static void main(String[ ] args) {
        Scope1 s = new Scope1();
        int a = 4; 
        int b = 5;

        b = s.two(a, b);
        IO.outputln("Main: " + s.a + "," + b + "," + s.c); }
}

Here is what is going on. Check my comments. You need to understand the difference between instance fields and local variables.

public class Scope1 {
    private int c = 1;
    private int a = 2;
    
    public static void main(String[] args) {
        
        Scope1 s = new Scope1();
        int a = 4;
        int b = 5;
        
        b = s.two(a, b); // returning 4 from two and assigning to local b
        // prints instance values a and c and local b.
        IO.outputln("Main: " + s.a + "," + b + "," + s.c);
    }
    
    public int one(int a, int b) {
        // you are passing in 5 and 4 from method two
        c = a * 2; // c = 10    instance
        a = 3 + b; // a = 7     local
        b = b + 1; // b = 5     local
        // now you print them
        IO.outputln("One: " + a + "," + b + "," + c);
        return b;  // and return 5
    }
    
    public int two(int a, int b) {
        //you are passing in 4 and 5 from main
        c = one(b, a);  // call one reversing the values. This sets 
        //instance c to 5
        this.a = a + 1; // Instance field a = 5 and local b is unchanged.
        // so you print 4,5,5 (local local instance)
        IO.outputln("Two: " + a + "," + b + "," + c);
        return a;
    }
    
}