The position of an object moving vertically along a line is given by the function 56) = 4.9!: + ZBt + 20. Find the average velocity of the object over the following intervals. a. [0,11 b. [[1,3] c. [0,81 11. [0,11], where h :> {i is a real number <: a. the average velocity is your answer. b. answer d.>