$12\mathrm{.}4($Mortgage Calculator App$)$ Create a mortgage calculator app that allows the user to enter a purchase price, down$-$payment amount and an interest rate. Based on these values, the app should calculate the loan amount $($purchase price minus down payment$)$ and display the monthly payment for $10-,20-$ and $30-$year loans. Allow the user to select a custom loan duration $($in years$)$ by using a Slider and display the monthly payment for that custom loan duration.

use following templates for fxml$,$ java, and java controller files

package mortgagecalc;

import javafx.application.Application;

import javafx.fxml$.$FXMLLoader;

import javafx.scene.Parent;

import javafx.scene.Scene;

import javafx.stage.Stage;

public class MortgageCalc extends Application $\{$

$$

$$ @Override

$$ public void start$($Stage stage$)$ throws Exception $\{$

$$ Parent root $=$ FXMLLoader.load$($getClass$().$getResource$("$MortgageCalc$.$fxml$"))$;

$$ Scene scene $=$ new Scene$($root$)$;

$$ stage.setScene$($scene$)$;

$$ stage.setTitle$("$Mortgage Calulator App"$)$;

$$ stage.show$()$;

$\}$

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

$$ launch$($args$)$;

$\}$

$\}$ package mortgagecalc;

import java.net.URL;

import java.util.ResourceBundle;

import javafx.fxml$.$Initializable;

public class MortgageCalcController implements Initializable $\{$

$$

$$ @Override

$$ public void initialize$($URL url, ResourceBundle rb$)\{$

$//$ TODO

$\}$

$$

$\}$