The Lennon family is renting an outdoor movie screen for their backyard party. The screen is 12 feet high, and it needs to be tethered to the ground with four guy wires 15 feet long.

a. How far from the screen must they attach the guy wires?

b. What is the angle of elevation of each guy wire?

c. They need to use four guy wires, one on each side of the screen in front of the screen, and one on each side on the back of the screen. Each guy wire should be 2 feet longer than necessary so it can be clamped at each end. How much guy wire do they need?