import java.io$.*$;

import java.util.Scanner;

public class StudentGradeReport $\{$

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

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

$//$ Step $1$: Read the file name of the tsv file from the user

System.out.print$("$Enter the name of the TSV file: $")$;

String tsvFileName $=$ scanner.nextLine$()$;

try $\{$

$//$ Step $2$: Open the tsv file and read student information

BufferedReader tsvReader $=$ new BufferedReader$($new FileReader$($tsvFileName$))$;

FileWriter reportFile $=$ new FileWriter$("$report$.$txt$")$;

BufferedWriter reportWriter $=$ new BufferedWriter$($reportFile$)$;

double totalMidterm$1=0\mathrm{.}0$;

double totalMidterm$2=0\mathrm{.}0$;

double totalFinal $=0\mathrm{.}0$;

int studentCount $=0$;

String line;

while $(($line $=$ tsvReader.readLine$())!=$ null$)\{$

String$[]$ data $=$ line.split$("\backslash$t$")$;

if $($data$.$length $==5)\{$

String lastName $=$ data$[0]$;

String firstName $=$ data$[1]$;

double midterm$1=$ Double.parseDouble$($data$[2])$;

double midterm$2=$ Double.parseDouble$($data$[3])$;

double finalScore $=$ Double.parseDouble$($data$[4])$;

$//$ Calculate the average exam score

double averageScore $=($midterm$1+$ midterm$2+$ finalScore$)/3$;

$//$ Assign a letter grade

String letterGrade $=$ assignLetterGrade$($averageScore$)$;

$//$ Output student information to report.txt

reportWriter.write$($lastName $+"\backslash$t$"+$ firstName $+"\backslash$t$"+$ midterm$1+"\backslash$t$"+$ midterm$2+"\backslash$t$"+$ finalScore $+"\backslash$t$"+$ letterGrade$)$;

reportWriter.newLine$()$;

$//$ Update totals for average exam scores

totalMidterm$1+=$ midterm$1$;

totalMidterm$2+=$ midterm$2$;

totalFinal $+=$ finalScore;

studentCount$++$;

$\}$

$\}$

tsvReader.close$()$;

reportWriter.close$()$;

$//$ Calculate and output the average of each exam with two digits after the decimal point

double avgMidterm$1=$ totalMidterm$1/$ studentCount;

double avgMidterm$2=$ totalMidterm$2/$ studentCount;

double avgFinal $=$ totalFinal $/$ studentCount;

FileWriter avgFile $=$ new FileWriter$("$report$.$txt$",$ true$)$;

BufferedWriter avgWriter $=$ new BufferedWriter$($avgFile$)$;

avgWriter.newLine$()$;

avgWriter.write$("$Average Exam Scores: $")$;

avgWriter.write$($String$.$format$("$Midterm$1$: $\%\mathrm{.}2$f$\backslash$tMidterm$2$: $\%\mathrm{.}2$f$\backslash$tFinal: $\%\mathrm{.}2$f$",$ avgMidterm$1,$ avgMidterm$2,$ avgFinal$))$;

avgWriter.close$()$;

System.out.println$("$Report generated successfully!"$)$;

$\}$ catch $($IOException e$)\{$

System.err.println$("$An error occurred while processing the file: $"+$ e$.$getMessage$())$;

$\}$

$\}$

private static String assignLetterGrade$($double averageScore$)\{$

if $($averageScore $>=90)\{$

return $"$A$"$;

$\}$ else if $($averageScore $>=80)\{$

return $"$B$"$;

$\}$ else if $($averageScore $>=70)\{$

return $"$C$"$;

$\}$ else if $($averageScore $>=60)\{$

return $"$D$"$;

$\}$ else $\{$

return $"$F$"$;

$\}$

$\}$

$\}$