Sue likes to walk in the desert. She walks at 2 miles per hour in the desert, and at 4 miles per hour on roads. She wants to get to the parking lot as quickly as possible when she is 1 mile from the road and the parking lot is 2 miles down the road, as pictured. Rather than walking straight toward her car, or straight toward the road, she will walk at an angle toward the road so she can spend more time walking on the road which is faster. Where should she aim to get to her car the quickest