Table 20-2: Units of Oranges and Marginal Utility of Oranges (utils)
1 - 20
2 - 16
3 - 13
4 - 11
5 - 8

Refer to Table 20-2. What is the total utility for the first four oranges?
a. 60 utils
b. 11 utils
c. 52 utils
d. 1