Decision or Selection Structures and Loops

$($Decision Tree: If $-$ else if $-$ else loop$)$ The charges for Wireless for one of the mobile companies is given in the following table. Use if else if else decision structure.

Plan

Allowed Data Per User

Monthly Charges per user

Plan$15$

Less than $15$ GB

$$14\mathrm{.}99$

Plan$25$

Less than $25$ GB

$$24\mathrm{.}50$

Plan$50$

Less than $50$ GB

$$35\mathrm{.}00$

Unlimited

Greater than or equal to $50$GB

$$50\mathrm{.}00$

Write a JAVA method to calculate the annual charges fine calcAnnChargeFirstname called from main.

The variables in the program should be named as shown below and should be input by the user:

expectedDataUsage$\_$firstname$\_//($Expected data usage per user in the household $$ int data type$)$

numUsers$\_$firstname $//($ Number of users in the household $$ int Data type$)$

tax$\_$pct$\_$firstname $//($ A double data type$)$ This is the tax percentage on the invoice. Tax is applied on the overall calculated charges.

The program also should display the following message for each of the above cases as shown in the table below:

Allowed Data Per User

Message

Less than $15$ GB

You are on Plan$15$ and can use upto$15$ GB per month per user

Less than $25$ GB

You are on Plan$25$ and can use upto $25$ GB per month per user

Less than $50$ GB

You are on Plan$50$ and can use upto $50$ GB per month per user

Greater than or equal to $50$GB

You are on Unlimited plan and Enjoy unlimited data for all users

Your method should calculate the Annual total charges per household including the taxes and also should do the display.

Charges should be calculated using an if $-$ else if $-$ else decision structure and make it more efficient by not repeating code as much as possible.

The Message from the above table should be displayed using a Switch $$ Case decision structure.