Compute all parts of given question:
Question; A person walks first at a constant speed of 4.50 m/s along a straight line from point circled A to point circled B and then back along the line from circled B to circled A at a constant speed of 2.85 m/s.
Part A: What is her average speed over the entire trip?
Part B: What is her average velocity over the entire trip?
Please show all work and explain your methods to find her average speed over the entire trip.