A gold mine has two​ elevators, one for equipment and another for the miners. The equipment elevator descends 4 feet per second. The elevator for the miners descends 14 feet per second. One​ day, the equipment elevator begins to descend. After 24 ​seconds, the elevator for the miners begins to descend. What is the position of each elevator relative to the surface after another 15 ​seconds? At that​ time, which elevator is​ deeper?