In this case study, an ecommerce website is considered. In this website, when customers choose items of interest to purchase, they go to their shopping cart. When they are ready to proceed with their purchases, they click on Checkout button to pay for the items. At that point, the customer logs into the site to enable the site to retrieve their payment information. (a) Let us assume that the shopping cart saves the associated items and prices on the server in a file. Specifically, for each customer a file is created. The website identifies the customers by their IP addresses. Is this design vulnerable to a DoS attack? Explain why or why not