please answer these 2 questions, calculus for business administration.

Calculus: Learning Worksheets Chapter 4 3. A commercial apple grower estimates from past records that if 50 trees are planted per acre, then each tree will yield an average of 70 pounds of apples per season. If, for each additional tree planted per acre (up to 30), the average yield is reduced by 1 pound, how many trees should be planted per acre to obtain the maximum yield per acre? What is the maximum yield? Calculus: Learning Worksheets Chapter 4 4. A 400-room hotel in New York City is lled to capacity every night at $100 a room. For each $2 increase in rent, 4 fewer rooms are rented. If each rented room costs $12 to service per day, how much should the management charge for each room to maximize gross prot? What is the maximum gross prot