Question

5. What is a computer ? How is it a useful device?​

Answer 1

A computer is a programmable machine  Generally, we are Using a computer to type documents, send email, play games, and browse the Web. and also use it to edit or create spreadsheets, presentations, and even videos.it is very useful to gain knowledge of anything if it is related with our subjects or not. Explanation:

Answer 2

hope it will help

An electronic machine that can store, find and arrange information , calculate amount and control other machines.

It is useful for students in these days for online class.