Draw the Control Flow Graph $($CFG$)$ for $$ public static void main$($String$[]$ args$)\{$

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

$$

$$ System.out.print$("$Enter the student's numeric score: $")$;

$$ int studentScore $=$ input.nextInt$()$;

$$

$$ String resultGrade $=$ getGrade$($studentScore$)$;

$$ System.out.println$("$The corresponding grade is: $"+$ resultGrade$)$;

$$

$$ input.close$()$;

$\}$

$\}$

$$

JUnit Test Cases $($GradeCalculatorTest$.$java$)$

$$

import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.$*$;

$$

public class GradeCalculatorTest $\{$

$$

$$ @Test

$$ void shouldReturnAForScoresInRange$()\{$

$$ assertEquals$("$A$",$ GradeCalculator.getGrade$(95))$;

$$ assertEquals$("$A$",$ GradeCalculator.getGrade$(90))$;

$$ assertEquals$("$A$",$ GradeCalculator.getGrade$(100))$;

$\}$

$$

$$ @Test

$$ void shouldReturnBForScoresInRange$()\{$

$$ assertEquals$("$B$",$ GradeCalculator.getGrade$(85))$;

$$ assertEquals$("$B$",$ GradeCalculator.getGrade$(80))$;

$$ assertEquals$("$B$",$ GradeCalculator.getGrade$(89))$;

$\}$

$$

$$ @Test

$$ void shouldReturnCForScoresInRange$()\{$

$$ assertEquals$("$C$",$ GradeCalculator.getGrade$(75))$;

$$ assertEquals$("$C$",$ GradeCalculator.getGrade$(70))$;

$$ assertEquals$("$C$",$ GradeCalculator.getGrade$(79))$;

$\}$

$$

$$ @Test

$$ void shouldReturnDForScoresInRange$()\{$

$$ assertEquals$("$D$",$ GradeCalculator.getGrade$(65))$;

$$ assertEquals$("$D$",$ GradeCalculator.getGrade$(60))$;

$$ assertEquals$("$D$",$ GradeCalculator.getGrade$(69))$;

$\}$

$$

$$ @Test

$$ void shouldReturnFForScoresInRange$()\{$

$$ assertEquals$("$F$",$ GradeCalculator.getGrade$(55))$;

$$ assertEquals$("$F$",$ GradeCalculator.getGrade$(0))$;

$$ assertEquals$("$F$",$ GradeCalculator.getGrade$(59))$;

$\}$

$$

$$ @Test

$$ void shouldReturnInvalidForOutOfRangeScores$()\{$

$$ assertEquals$("$Invalid score. Please enter a value between $0$ and $100.",$ GradeCalculator.getGrade$(-10))$;

$$ assertEquals$("$Invalid score. Please enter a value between $0$ and $100.",$ GradeCalculator.getGrade$(110))$;

$\}$

$\}$