Please answer the following questions

1. Let a firm have the following average cost function: ac(y)=4y2-5y-4-y If the price of y is set at 3200 and at this point the firm is producing 10 units of y. What is the firm's profit? 2. The firm has the following marginal cost function: MC[y]=3+.25y what is the change in producer surplus when the price of y changes from $20 to 31$ (Recall, the change in producer surplus is equal to the new producer surplus minus the old producer surplus). Round answers to 4 decimal places. 3. The firm has the following cost function: C(y)=3y2+34y What is the firm's producer surplus at y=25? Round answers to 4 decimal places