1. A ladder 16 feet long is leaning against the wall of a tall building. The base of the ladder is moving away from the wall at a rate of 1 foot per second. A. How fast is the top of the ladder moving down the wall when the base of the ladder is 8 feet from the wall? B. Find the rale at which the angle x between the ladder and the wall of the building is changing when the base of the ladder is 8 feet from the wall. C. A right triangle is formed by the ladder, the wall, and the ground. How fast is the area of this triangle changing when the base of the ladder is 8 feet from the wall