In java please

Write a SelfPayKiosk class to support basic operations such as scan item, cancel transaction, checkout, and make payment. SelfPayKiosk.java is provided with method stubs. Follow each step to gradually complete all methods. Add statements in main$()$ as methods are completed to support development mode testing

Step $0.$ Declare private fields for number of customers served $($int$),$ total sales $($double$),$ and current amount due $($double$).$ Note the provided final variable for sales tax of $7\%.$

Step $1(1$ pts$).1)$ Complete the constructor to initialize all private fields to zero. $2)$ Complete the accessor methods to return the number of customers served, total sales, and current amount due. Submit for grading to confirm $1$ test passes.

Step $2(2$ pt$).$ Complete the scanItem$()$ method. Increase the amount due by parameter price. Do not update amount due if parameter price is negative. Submit for grading to confirm $3$ tests pass.

Step $3(1$ pt$).$ Complete the checkOut$()$ method. Multiply amount due by SALES$\_$TAX and add to amount due. Submit for grading to confirm $4$ tests pass.

Step $4(2$ pts$).$ Complete the makePayment$()$ method. If parameter payment is enough to pay the amount due, increase total sales by amount due, increment number of customers served, and reset amount due to zero in preparation for the next customer. However, if parameter payment is not enough, update total sales by payment and reduce amount due by payment. Do not make any changes if parameter payment is negative. Submit for grading to confirm $6$ tests pass.

Step $5(1$ pt$).1)$ Complete the resetKiosk$()$ method to reset all private fields to zero. $2)$ Complete the cancelTransaction$()$ method to reset amount due to zero. Submit for grading to confirm $7$ tests pass.

Step $6(2$ pts$).$ Complete the simulateSales$()$ method to perform multiple transactions with increasing prices. Use a loop to simulate parameter numSales transactions. Within the loop, call scanItem$()$ with parameter initialPrice. Call checkOut$()$ and makePayment$()$ to make a payment of $$1$ more than the amount due. Finally, increase the item price by parameter incrPrice in preparation for the next transaction. Submit for grading to confirm $8$ tests pass.

Step $7(1$ pt$).$ Add a boolean private field to indicate if the customer has checked out and is ready to make a payment. Only allow payment after customer has checked out. The cancelTransaction$()$ method should not reset amount due if the customer has checked out. Update the following methods by inserting assignment statements and if statements related to the boolean filed: constructor, checkOut$(),$ makePayment$(),$ and cancelTransaction$().$ Ex: Set the boolean field to false only after full payment has been made. Submit for grading to confirm all tests pass.

This is the current code

public class SelfPayKiosk$\{$

private final double SALES$\_$TAX $=0\mathrm{.}07$;

$//$ Constructor

public SelfPayKiosk$()\{$

$/*$ Complete the method $*/$

$\}$

$//$ Return total daily sales

public double getTotalSales$()\{$

$/*$ Update the return statment $*/$

return $-1\mathrm{.}0$;

$\}$

$//$ Return current amount due

public double getAmountDue$()\{$

$/*$ Update the return statment $*/$

return $-1\mathrm{.}0$;

$\}$

$//$ Return number of customers served

public int getNumCustomers$()\{$

$/*$ Update the return statment $*/$

return $-1$;

$\}$

$//$ Scan one item

public void scanItem$($double price$)\{$

$/*$ Complete the method $*/$

$\}$

$//$ Apply sales tax to current purchases

public void checkOut$()\{$

$/*$ Complete the method $*/$

$\}$

$//$ Cancel current purchases

public void cancelTransaction$()\{$

$/*$ Complete the method $*/$

$\}$

$//$ Reset register for the day

public void resetKiosk$()\{$

$/*$ Complete the method $*/$

$\}$

$//$ Apply payment to amount due

public void makePayment$($double payment$)\{$

$/*$ Complete the method $*/$

$\}$

$//$ Simulate multiple transactions

public void simulateSales$($int numSales, double initialPrice, double incrPrice$)\{$

$/*$ Complete the method $*/$

$\}$

$\}$

Thank you