Choose the correct statements.1. Opportunity cost of a good is the increase in the quantity produced of one good divided by the decrease in the quantity produced of another good as we move along the PPF.2. The opportunity cost of an action is the highest-valued alternative forgone.3. Opportunity cost is a ratio.4. There is no relationship between the opportunity cost of producing an additional good measured on the x-axis and the opportunity cost of producing an additional good measured on the y-axis.