For questions #7 - 10, solve the problem by following the procedure for solving an optimization problem. Show all your steps. Include a concluding statement that summarizes your answer and includes the correct units. 7. An apple orchard now has 80 trees per hectare and the average yield is 400 apples per tree. For each additional tree planted per hectare the average yield per tree is reduced by approximately four apples. How many trees per hectare will give the largest crop of apples? 8. Time to Travel advertises a package plan for an Arizona vacation. The fare for the flight is $400/person plus $8/person for each unsold seat on the plane. The plane holds 120 passengers and the flight will be cancelled if there are fewer than 25 passengers. What number of passengers will maximize revenue?