Web designers can evaluate a site's by giving visitors a series of tasks to complete and observing their performance on the tasks. A. transferability B. usability C. efficiency D. satisfaction level E. stickiness

Usability

Explanation:

Usability is a technique to evaluate a website functionality by testing it on users. This is often done by asking users to complete tasks, typically while they are being observed, to see where they encounter problems and experience confusion.

Steps to conduct usability testing on a website, namely;

yes we can change both the color of the value of a cell as well as background color of a cell at the same time .

as we know that excel sheet consists of columns and rows.

and intersection of column and row is called cell.

we can change color of the cell and background of the cell at the same time.

hence the statement that

can a person change color of the cell and background of the cell at the same time is true.