Long Answer Q5. [8 points] A fire fighter places an extension ladder against the wall of a building so that the bottom of the ladder is fixed on the ground 6 feet away from the wall. The fire fighter is decreasing the length of the ladder at a rate of 2 feet per second (without letting the bottom of the ladder move). How fast is the top of the ladder sliding down the wall when the ladder is 10 feet long? You must show all steps in your calculation and clearly define any variables you use