Sherri has recently been injured. she is having a problem using her left hand and would like to use a stylus to move her mouse around the screen on her laptop computer. what device can sherri add to her system to allow a non-touch screen laptop to use a stylus to manipulate the screen?

Answer is a Digitizer.

Explanation:

A digitizer is a transparent sheet , which is a middle layer , on top of the screen. An input and hardware device , which has the ability of converting analog signals to digital signals. This means that, It converts ones actions into signals which the computer understands.

It is being protected by a protective glass from the top.