Which describes the safest way to sit at a desk while typing on the computer?

a. keep the knees and hips at 90-degree angles and the wrists straight.

b. elevate the knees, keep the hips at a 90-degree angle, and keep the shoulders back

c. keep the monitor above the eyes and the keyboard slightly raised

d. keep the monitor at eye level and the keyboard slightly raised.

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.