Purpose

The purpose of this assignment is to utilize basic JavaScript, as learned in this class, to show knowledge on objects functions, variables, and more.

Tasks

Credit Card Validation

You're starting your own credit card business. You've come up with a new way to validate credit cards with a simple function called validateCreditCard that returns true or false.

Here are the rules for a valid number:

Number must be $16$ digits, all of them must be numbers

You must have at least two different digits represented $($all of the digits cannot be the same$)$

The final digit must be even

The sum of all the digits must be greater than $16$

The following credit card numbers are valid:

$9999-9999-8888-0000$

$6666-6666-6666-1666$

The following credit card numbers are invalid:

a$923-3211-9$c$01-1112$ invalid characters

$4444-4444-4444-4444$ only one type of number

$1111-1111-1111-1110$ sum less than $16$

$6666-6666-6666-6661$ odd final number

Hint: Remove the dashes from the input string before checking if the input credit card number is valid. $($check out split$()$ and join$()$ methods.

$3$ points extra: Make your credit card scheme even more advanced! What are the rules, and what are some numbers that pass or fail? Ideas: check the expiration date! Check out the Luhn Algorithm for inspiration.

The Cash Register

Implement a class called Item

Item class should have the following fields: name, price

$------------------------------------------------------------------------------$

Implement a class called ShoppingCart

ShoppingCart class should have an array of items

ShoppingCart class should a method called addItem, which adds a new item to the shopping cart. The addItem method should accept one argument $($e$.$g$.$ item$)$ and it should add that item into the array.

$-----------------------------------------------------------------------------$

Write a function called that accepts a ShoppingCart object. The function should return the total price of the shopping cart. This function should be outside of both ShoppingCart and Item classes.

Create multiple instances of the shopping cart object and show the results for each instance in your choice of display.

Examples:

Here are a few examples of unit tests

const item$1=$ new Item$("$apple$",5)$;$//$ apple is the name, $5$ is the price

const item$2=$ new Item$("$carrot$",\mathrm{.}45)$;

const item$3=$ new Item$("$shirt$",55)$;

const cart $=$ new ShoppingCart$()$;

cart.addItem$($item$1)$;

cart.addItem$($item$2)$;

cart.addItem$($item$3)$;

Bonus $($Extra $3$ points$)$: Update your Shopping Cart Object to add a taxable field to each item in the cart. Update your cashRegister function to apply $10\%$ tax to the taxable items only, and outputs the correct total. Create multiple instances of the shopping cart object and show the results for each instance in your choice of display.

Acceptance Criteria

Your code must be appropriately commented. Any variables, functions, objects, or algorithms that are not obvious, must be commented on$.$

Your code must output the required output.

Completion

submit JavaScript file$($s$)$ with the name lastname$\_$firstname$\_$assignment$5.$js or copy and paste your code into Canvas so that your instructor can run them successfully in Visual Studio Code. No HTML is needed for this assignment. You can use the console.log to test your program.