Which of the following statements or questions exemplify positive economics? (check all that apply)

a. The unemployment rate in Mexico is higher than in the United States.
b. Should the unemployment rate in the United States be lower than in Mexico?
c. When the government increases the minimum wage the unemployment rate will rise.
d. The government ought to increase the minimum wage so that incomes rise.
e. As the flight ticket prices fall, airlines experience a sharp increase in revenue.

a. The unemployment rate in Mexico is higher than in the United States.
c. When the government increases the minimum wage the unemployment rate will rise.
e. As the flight ticket prices fall, airlines experience a sharp increase in revenue.