What am i doing wrong: package com.gradescope.lab$\_$one;

import java.util.HashSet;

import java.util.Scanner;

import java.util.Set;

public class Quadratic $\{$

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

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

double a $=$ scanner.nextDouble$()$;

double b $=$ scanner.nextDouble$()$;

double c $=$ scanner.nextDouble$()$;

Set roots $=$ solveQuadratic$($a$,$ b$,$ c$)$;

if $($roots $==$ null$)\{$

System.out.println$("$No real solutions"$)$;

$\}$ else $\{$

for $($Double root : roots$)\{$

System.out.printf$("\%\mathrm{.}2$f $",$ root$)$;

$\}$

$\}$

scanner.close$()$;

$\}$

public static Set solveQuadratic$($double a$,$ double b$,$ double c$)\{$

Set roots $=$ new HashSet;

double discriminant $=$ b $*$ b $-4*$ a $*$ c;

if $($discriminant $<mtext></mtext><mn>0</mn><mi>)</mi><mtext></mtext><mi>\{</mi>$

return null;

$\}$

double root$1=(-$b $+$ Math.sqrt$($discriminant$))/(2*$ a$)$;

double root$2=(-$b $-$ Math.sqrt$($discriminant$))/(2*$ a$)$;

roots.add$($root$1)$;

roots.add$($root$2)$;

return roots;

$\}$

$\}$

error: file not found: Quadratic.java

Usage: javac

use $--$help for a list of possible options $```$

package com.gradescope.lab$\_$one;

import java.util.HashSet;

import java.util.Scanner;

import java.util.Set;

public class Quadratic $\{$

Run $|$ Debug $|$ Run main $|$ Debug main

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

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

double a $=$ scanner.nextDouble$()$;

double b $=$ scanner.nextDouble$()$;

double c $=$ scanner.nextDouble$()$;

Set roots $=$ solveQuadratic$($a$,$ b$,$ c$)$;

if $($roots $==$ null$)\{$

System.out.println$("$No real solutions"$)$;

$\}$ else $\{$

for $($Double root : roots$)\{$

System.out.printf$("\%\mathrm{.}2$f $",$ root$)$;

$\}$

$\}$

scanner.close$()$;

$\}$

public static Set solveQuadratic$($double a$,$ double b$,$ double c$)\{$

Set roots $=$ new HashSet;

double discriminant $=$ b $*$ b $-4*$ a $*$ c;

if $($discriminant $<mtext></mtext><mn>0</mn><mi>)</mi><mtext></mtext><mi>\{</mi>$

return null;

$\%$

double root$1=(-$b $+$ Math.sqrt$($discriminant$))/(2*$ a$)$;

double root$2=(-$b $-$ Math.sqrt$($discriminant$))/(2*$ a$)$;

roots.add$($root$1)$;

roots.add$($root$2)$;

return roots;

$\}$

$\}$

$```$