Data types are an abstraction of data and data structures are a

way to store the types into memory. In particular, we never store physical

objects in memory; in case when we really want to do it$,$ we first represent the

physical objects in an abstract representation and store the representation

in memory. Here is a problem. There are $40$ students in a classroom. I

want to design a closet so that any one of the students can be hidden inside.

Imagine that the closet is a chunk of computer memory. Then, how big $($in

bits$)$ closet do you need?