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 17 feet per second. One​ day, the equipment elevator begins to descend. After 21 ​seconds, the elevator for the miners begins to descend. What is the position of each elevator relative to the surface after another 14 ​seconds? At that​ time, which elevator is​ deeper? The position of the equipment elevator relative to the surface is_____feet.