Solve the all parts of given question:
Question: A student throws a ball vertically upward such that it travels 6.5m to its maximum height.
Part A: If the ball is caught at the initial height 2.1s after being thrown, what is the ball's average speed?
Part B: What is the ball's average velocity?
It'd be really helpful if you could show all steps of your work. And express your answer using two significant figures.