Write a function named vowel_tracker that computes and returns how many strings in a list of strings begin and/or end with a vowel. (The letters a, e, i, o and u are vowels. Both upper and lower case vowels should be tracked.)

Your mother is sure that you were driving too fast because she knows a. when you arrived and the direction you came from. b. how long it took you to get home and how far you traveled. c. what time you left and how long it took you to get home. d. the direction you were driving and how far you traveled.