=+the data in the accompanying table. Assume that Alexa’s total benefit and marginal benefit remain as reported in Table 9-5. Use this information to calculate (i) Alexa’s new marginal cost, (ii) her new profit, and (iii) her new optimal years of schooling. What kind of marginal cost does Alexa now have—constant, increasing, or decreasing?

Quantity of schooling (years) | Total cost

° | So 1 | 90,000 2 | 120,000 3 | 170,000 4 | 250,000 5 | 370,000