Explain why some file types $($i$.$e$.$ videos$)$ take up more memory than other file types $($i$.$e$.$ text files$)$ by comparing the memory used for each file listed below.

a$)$ a text file that contains $1000$ characters

b$)$ a picture that is $480$ pixels x $620$ pixels

c$)$ a video that is $1$ minute long and runs at $100$ FPS

You do not have to do the math but you do have to explain in detail how you would calculate the amount of memory for each.