5. Consider a scenario in which a 20ft tall lamppost lights up a street. A 5ft tall woman stands close to the lamppost and the lamppost casts her shadow on the ground in front of her. If she walks away from the lamppost at a constant speed of 2ft/s, how quickly will the length of her shadow change? Now suppose two people, one shorter than the other, walk away from the lamppost at the same constant speed v. Whose shadow is increasing faster, the taller person's or the shorter person's?