5) (20%) Pick ONE from the following problems to solve. A streetlight is on a pole 9 ft tall. A boy 3 ft tall walks away from the pole at a rate of 5 ft/sec. At what rate is his shadow lengthening when he is 30 ft from the pole? Write the solution in the following box: You have 16 feet of fencing to enclose a rectangular garden next to your house. Find the maximum of the area of your garden. Write the solution in the following box