SmartPhone

data$\_$mega$\_$byte$//$integer minutes $//$type: double datacost$//$ accept double numbers voicecost$//$ accept double numbers

All constructors

setters an getters as needed

$...//$add more methods if needed

toString $0$

getBillo:double

$\backslash$table$[[$Device$],[$model name$//$string$],[$IMEI $//$type: string $($number on any device$)],[$price$//$ accept double numbers$],[$manufactureDate: String $($dd$/$mm$\text{'}$yyyy$)],[1.$ All constructors$],[2.$ setters an getters as needed$],[3.$ toString$()],[4.$ getBing$]]$

MobilePhone

sms$\_$no$//$string

package$\_$no$//$ string

price$\_$package$//$ accept double numbers

smscost$//$ accept float numbers

All constructors

setters an getters as needed $//$add more methods if needed

tostringo

getBillo:double

Part A

Specify the relationship between classes.

Implement the different constructors for each class.

c$.$ The IMEI includes a mixture of letters and digits, with all letters capitalized.

When reading the IMEI from the user, you must check whether it meets the above requirements before accepting$/$setting the value. Otherwise, you have to throw an exception $($new MyException$("$The entered IMEI is not valid"$)),$ where MyException is a custom evception you have to develop yourself.

Examples of invalid IMEI: ABX$900,$ ABX$900$CBz$,$ ABXFGJJKA, $900$ABCABC. These IMEIs are not accepted because they may have a length of fewer than $9$ digits, they don't start with three characters, or they contain lowercase letters.

Examples of a valid IMEI: ABX$900$CBZ

In the SmartPhone class, add the following methods:

getBill $()$ This method is responsible for returning the value of the bill using the following formula: data$\_$mega$\_$bytevoiceCost;

In the mobilePhone class, add the following methods:

getBill $$ This method is responsible for returning the value of the bill using the following formula: sms$\_$no$*$smscost$+$price$\_$package;

Part C

Write a driver class called Driver$\_$YourStudentiD, for example, Driver$\_1221089.$ This driver should test all methods. The driver must read data from a text file with the extension $\text{'}.$ txt$\text{'}.$