Kiyomi has four pairs of pants (black, peach, gray, and cream), and she has five shirts (white, red, teal, black, and lavender).

a. If any shirt can be worn with any pair of pants, represent the sample space of all possible outfits with
both a probability area model and a tree diagram. How many outfits does she own?

b. The closet light is burned out, so Kiyomi must randomly select a pair of pants and a shirt. What is the
probability that she will wear something black?