how would you start this problem

The position of an object moving vertically along a line is given by the function s(t}= 4.9[2 +29t+15. Find the average velocity of the object over the following intervals. 3. [0,2] b. [[1,5] c. [0,8] d. [0J1], where h>0 is a real number a. The average velocity is El. (Simplify your answer.)