16. Place a the letter of each of the following in the correct box (16 points)
a. Police protection
e. Your TV set
b. Shrimp in the ocean
f. An unused public tennis court
c. Public vaccinations
g. Seashells on a beach
d. Picnic tables in a national park. h. Your uncle's fishing boat
Rival
Nonrival
Exclusive
Nonexclusive