Class declarations and object modeling: Correct Solution

Translate the specification below into an idiomatic Java class definition.

(In this context, "idiomatic" means following the common style and conventions of the language.)

One kind of thing that exists in our model is a Muert.
All Muerts share a single BOTISS, which is an int. It is a constant. Its value is 7. Other classes cannot see its value.
Each Muert has its own elEc, which is a string. The value of elEc is specified when a Muert is created. Anyone can ask a Muert for the value of its elEc. Anyone can set elEc to a new value.
Each Muert has its own oePesm, which is a list of strings. The value of oePesm is specified when a Muert is created. Anyone can ask a Muert for the value of its oePesm. The value of oePesm for a specific Muert can never change.
Each Muert has a phet, which is a string. A phet is part of the internal state of a Muert: no other classes can see the value of phet or directly change it. When a Muert is first created, the value of its phet starts out as "feussa".
Each Muert has a fes, which is an int. The value of fes is not part of a Muert’s internal state; instead, it is computed on demand. The computed value of fes is BOTISS plus 9.
A Muert can iawnate. This behavior adds "napent" to phet. Anyone can ask a Muert to iawnate.
A Muert can pibilize. This behavior adds "oeng" to phet. Anyone can ask a Muert to pibilize.

Solution

public class Muert {
    public final int BOTISS = 7;
    private final String elEc;
    private List<String> oePesm;
    public String phet = "feussa";
    private int fes;

    public Muert(String elEc, List<String> oePesm) {
        this.elEc = elEc;
        this.oePesm = oePesm;
    }

    public String getElEc() {
        return elEc;
    }

    public List<String> getOePesm() {
        return oePesm;
    }

    public void setOePesm(List<String> oePesm) {
        this.oePesm = oePesm;
    }

    public int getFes() {
        return BOTISS + 9;
    }

    public void setFes(int fes) {
        this.fes = fes;
    }

    private void setIawnate() {
        phet += "napent";
    }

    private void setPibilize() {
        phet += "oeng";
    }
}

Things to check in your solution:

Is every public and private modifier correct?
Are the correct items static?
Are the correct items final?
Are all the variable types and method return types correct?
Are the class members in the correct order? It should be: (1) static variables, (2) instance variables, (3) constructors, (4) methods.
Do members have the correct capitalization?

Acceptable variations in the solution:

It is OK if you initialized non-static variables in the constructor instead of in the declaration. (Ask your instructor if you aren’t clear what this means.) Note that static variables must be initialized in the declaration.
It is OK if you used a slightly different but equivalent form of an expression, such as += 1 instead of ++.

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