Simple Java Methods question (Edited)

Hello

I'm new to coding (total novice) and i am having trouble with the following program. (see below and question attached)

How do I print out my assignGrade method??? I had to initialise it in Main manually. The rest of the program works fine?
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package Lab8;
import java.util.Scanner;

public class ClassTest2Retry {

    static Scanner input = new Scanner(System.in);

    //method enterName()
    public static String enterName(){
        System.out.println("Enter name");
        return input.nextLine();
    }
    //method enterMark()
    public static int enterMark(String value){
        System.out.println(value);
        return input.nextInt();
    }
    //method calculateAverage()
    public static int calculateaverage(int solo, int prose, int poem){
        return ((solo + prose + poem) /3);
    }
    // method assignGrade
    public static String assignGrade(int overall){
        if (overall <40){
            return "Fail";
        }else if (overall >40) {
            return "Pass";
        }
            else{
                return "Distinction";
            }
    }
    //method output results
    public static void outputResults (String name, int solo, int prose, int poem, int average, String grade){
        System.out.println("Name\t\t\t\t Solo\t\t\t\t Prose\t\t\t\t Poem\t\t\t\t Avg\t\t\t\t Grade");
        System.out.println(name + "\t\t" + solo+ "\t\t\t\t\t"+ prose+"\t\t\t\t\t" + poem + "\t\t\t\t\t"+ average);
    }

    public static void main(String[] args) {
        String nameMain, gradeMain;
        int soloMarkMain, proseMarkMain, poemMarkMain, averageMain, overallMain = 70;

        nameMain = enterName();
        soloMarkMain = enterMark("Enter Solo Mark");
        proseMarkMain = enterMark("Enter Prose Mark");
        poemMarkMain = enterMark("Enter Poem Mark");
        averageMain = calculateaverage(soloMarkMain, proseMarkMain,poemMarkMain);
        gradeMain = assignGrade(overallMain);
        outputResults(nameMain, soloMarkMain, proseMarkMain, poemMarkMain, averageMain, gradeMain);

    }//end main
}//end class
Class-Test-2-SpeechDrama.docx