To lower a pack of weight W to the hiker at C, the hikers at A and B have passed a rope ADB through a ring attached to the pack at D. The hiker at C is 64 ft below A and guides the pack using rope CD. Knowing that W = 120 lb and that at the instant shown the pack is at rest, determine the tension in each rope. (Hint: The tension is the same in both portions of rope ADB.)