There are too many answer in chegg but all arenot working so please do in with perfect coding

HTML Requirements

Collect the user's name, email address, and credit card information to generate an estimate.

Make sure there are at least five items available for sale.

JavaScript Requirements

All JavaScript code must be located in an external script file.

The following user inputs must be validated

2 Mandatory fields name and email address.

Fields with a specific format

Credit Card in format xxxx-xxxx-xxxx-xxxx, eg: 4111-1111-1111-1111

Credit Card Expiry Month in the format: MMM, e.g., NOV

Credit Card Expiry Year in the format: yyyy, e.g., 2021

At least one item should be bought, and the value customer enters in the item quantity input boxes should be a number. Do not use input type numbers in HTML. You must validate using JavaScript.

As a part of the fundraiser, the customer must donate $10 or 10% of the total price of the items they buy, whichever is higher. Automatically calculate the donation amount based on the total purchase.

If any errors exist, display all the error messages on the web page. Do not use a JavaScript popup box for this purpose or show only one error at a time.

Generate a receipt to give to the customer. Show only the last four digits of the credit card along with the rest of the information like name, email, products, quantity, total cost, donation amount, etc.