1. The DarulAman Water Utility (DWU) authority requires you to write a program that can calculate water usage charges and display water bills to its customers. There are three types of customers: Home, Commercial and Industrial. The water charge rates vary depending on the customer usage type as described below (code H means Home usage, code C means Commercial usage and code I means Industrial usage):

Code	Price
H	RM40.00 plus RM0.015 per litre
C	RM1000.00 for the first 40,000 litres used plus RM0.25 for each additional litre used
I	RM2000.00 if usage is between 40,000 and 100,000 litres (inclusive) RM3000.00 if usage is more than 100,000 litres

The program requires three inputs which are customer Account number, usage type code and customer water usage (in litres). The program will reread the usage type code if a wrong code is entered. The output will display the water bill which contains the account number, the usage type, the water usage and the calculated water charge amount. The calculated charge must be displayed to TWO (2) decimal digits.

The example of the program running (with three samples of inputs and outputs) are shown below (underlined texts are inputs to the program):

Account No:> 12345 Usage Type Code:> H Water Usage (in litres):> 1000 *****Water Bill***** Account No = 12345 Usage Type = Home Water Usage in Litres = 1000.0 Bill Amount = RM55.00 Do you want to check for another customer? [Y/N] : Y Account No:> 121212 Usage Type Code:> C Water Usage (in litres):> 40100 *****Water Bill***** Account No = 121212 Usage Type = Commercial Water Usage in Litres = 40100.0 Bill Amount = RM1025.00 Do you want to check for another customer? [Y/N] : Y Account No:> 313131 Usage Type Code:> U Usage Type Code:> E Usage Type Code:> I Water Usage (in litres):> 40100 *****Water Bill***** Account No = 313131 Usage Type = Industry Water Usage in Litres = 40100.0 Bill Amount = RM2000.00 Do you want to check for another customer? [Y/N] : N

The program uses TWO (2) methods. The first method named computeCharge is to compute the water charge amount. The second method named displayWaterBill is used for displaying (output) the water bill.

Based on the given descriptions, complete the following code:

1. Complete the implementation of the computeCharge method as shown below:

public static double computeCharge(String code, double usage) {

double charge = 0.0;

}

2. Complete the implementation of the displayWaterBill method as shown below:

public static void displayWaterBill(int acct, String code, double usage, double amount) {

System.out.println(*****Water Bill*****);

System.out.println(Account No = + acct);

System.out.print(Usage Type = );

}

3. Complete the implementation of the program main method as shown below:

import java.util.Scanner; public class DWU {

public static void main(String[] args) {

char check;

int accountNo;

String usageTypeCode;

double waterUsage, billAmount;

Scanner scan = new Scanner(System.in);

System.out.print(Account No:>);

accountNo = scan.nextInt();

}

}