You are an interplanetary search and rescue expert who has just received an urgent message: a rover on Mercury has fallen and become trapped in Death Kavine, a deep, narrow gorge on the borders of enemy territory. You zoom over to Mercury to investigate the situation. Death Ravine is a narrow gorge ? miles long, as shown below. There are volcanic vents al localius A ad D, idicale by e iangular sybls a ose locatioIS. The rover was heavily damaged in the fall, and as a result, most of its sensors are broken. The only ones still func tioning are its thermometers, which register only two levels: hul and culd. The rover sends back evidence E = hul when it is at a volcanic vent (A and D), and E cold othcrwisc. There is no chancc of a mistaken rcading. The rovcr fell into thc gorge at position