Why is adding anti-virus software to the computer a smart maintenance practice? it encourages the user to clean the computer more often. it increases the chance for malware and trojan horses. it prevents and removes harmful files before they can damage the computer. it stops illnesses from attacking the computer or user.

Jason typically uses the internet to buy various items. it the total cost of all of the items ordered, at one time, is $250 or more, then the shipping and handling is free, otherwise the shipping and handling is $15 per item. design an algorithm that prompts jason to enter the number of items ordered and the price of each item. (remember cost = number of items order times price) the algorithm then outputs the total billing amount including shipping and handling. your algorithm must use a loop (repetition structure) to get the number and price of each item. write this in algorithm format not program code format.