I need help with getting this code to execute properly $```$

import java.util.Scanner;

oublic class JavaExample

public static void main$($String args$[])$

$\{$

$/*$ This program assumes that the student has $6$ subjects,

$*$ thats why I have created the array of size $6.$ You can

$*$ change this as per the requirement.

$*/$

int marks$[]=$ new int$[6]$;

int i;

float total$=0,$ avg;

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

for$($i$=0$; i$<mn>6</mn>$; i$++)\{$

System.out.print$("$Enter Marks of Subject"$+($i$+1)+"$:$")$;

marks$[$i$]=$ scanner.nextInt$()$;

total $=$ total $+$ marks$[$i$]$;

$\}$

scanner.close$()$;

$//$Calculating average here

avg $=$ total$/6$;

System.out.print$("$The student Grade is: $")$;

if$($avg$>=80)$

$\{$

System.out.print$("$A$")$;

$\}$

else if$($avg$>=60$ && avg$<mn>8</mn><mn>0</mn><mi>)</mi>$

$\{$

System.out.print$("$B$")$;

$\}$

else if$($avg$>=40$ && avg$<mn>6</mn><mn>0</mn><mi>)</mi>$

$\{$

System.out.print$("$C$")$;

$\}$

else

$\{$

System.out.print$("$D$")$;

$\}$

$\}$

$``````$

import java.util.Scanner;

oublic class JavaExample

public static void main$($String args$[])$

$\{$

$/*$ This program assumes that the student has $6$ subjects,

$*$ thats why I have created the array of size $6.$ You can

$*$ change this as per the requirement.

$*/$

int marks$[]=$ new int$[6]$;

int i;

float total$=0,$ avg;

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

for$($i$=0$; i$<mn>6</mn>$; i$++)\{$

System.out.print$("$Enter Marks of Subject"$+($i$+1)+"$:$")$;

marks$[$i$]=$ scanner.nextInt$()$;

total $=$ total $+$ marks$[$i$]$;

$\}$

scanner.close$()$;

$//$Calculating average here

avg $=$ total$/6$;

System.out.print$("$The student Grade is: $")$;

if$($avg$>=80)$

$\{$

System.out.print$("$A$")$;

$\}$

else if$($avg$>=60$ && avg$<mn>8</mn><mn>0</mn><mi>)</mi>$

$\{$

System.out.print$("$B$")$;

$\}$

else if$($avg$>=40$ && avg$<mn>6</mn><mn>0</mn><mi>)</mi>$

$\{$

System.out.print$("$C$")$;

$\}$

else

$\{$

System.out.print$("$D$")$;

$\}$

$\}$

$``````$

package gradecalculater;

import static org.junit$\_$jupiter,api.Assertions.assertEquals;

import org.junit.Test;

public class IGradeCalculator $\{$

@Test

public void test$()\{$

gradecalculator Test $=$ new gradecalculator$()$;

int output $=$ test.gradecalculator$("$Alphabet$")$;

assectEquals$(2,$ output$)$;

$\}$

$\}$

$```$