Stack frames and objects (like the Idea Lab activity): Correct Solution

Given the code below, this method call:

Skiou.nuaXissa();

...will eventually reach the point marked HERE. Draw a diagram of the stack and the heap at that point.

(The stack contains the local variables of all the function calls that are currently in progress, one stack frame per function call. The heap contains all of the objects that currently exist.)

In your diagram:

Label each stack frame with the name of the method.
Label each object with the name of its class.
Include the names of all the variables that belong to each object and stack frame, including the implicit this parameter if present. (You do not need to write the types of any variables.)
When a variable's value is null or a primitive, write the value immediately next to the variable.
When a variable points to an object, draw an arrow from the variable to the object it points to.

The code:

public class Skiou {
    private int sqa;
    private Epess eun;
    private Skiou toc;

    Skiou(int sqa) {
        this.sqa = sqa;
    }

    public void setEun(Epess eun) {
        this.eun = eun;
    }

    public void setToc(Skiou toc) {
        this.toc = toc;
    }

    public void graid() {
    }

    public static void nuaXissa() {
        Skiou.fraep(new Epess(884), new Skiou(655), new Skiou(155));
    }

    public static void fraep(Epess os, Skiou pa, Skiou huqa) {
        int al = 77;
        new Skiou(552).graid();
        os.setAat(huqa);
        os.ongEnspar(al, new Epess(379), os);
    }

    public static void pralra() {
        int spou = 80;
        int ha = 45;
        int o = 72;
        int cel = 66;
    }

    public static void fank(int ul) {
        int he = 63;
        int iss = 41;
    }
}

public class Epess {
    private int pei;
    private Skiou aat;

    Epess(int pei) {
        this.pei = pei;
    }

    public void setAat(Skiou aat) {
        this.aat = aat;
    }

    public static void blisse(Epess di, int feue, Epess dic) {
        int zi = 95;
        Skiou.fank(zi);
        HERE;
        Skiou.pralra();
    }

    public void ongEnspar(int mi, Epess imse, Epess cim) {
        Epess.blisse(new Epess(523), mi, this);
    }
}

Solution

Hints for practicing this puzzle:

Practice with difficulty 0, then work your way up. This will help you get a handle on what the puzzle is asking.
There is only one path through the code from the starting method call to HERE. Start by finding that path.
Be thorough. Double check that you've fully diagrammed each step before you move on to the next one.
You can feed this code into https://pythontutor.com and watch a diagram like this build up step by step. (Yes, despite the web site's name, it also works with Java.)

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