Question

What is the net displacement of the particle between 0 seconds and 80 serving seconds

Answer 1

Science and Math questions are almost always answered
using the given information.  There isn't any of that here and,
just as we'd expect, it's not possible to answer the question
without it.

This question is exactly as if I asked you:  How many inches
did I grow between  1953  and 1965 ?