Aperson steps into an elevator and rides to the 4th floor. at the 4th floor, another occupant of the elevator steps out, and the elevator continues to the 8th floor. once at the 8th floor, the person realizes that he has forgotten something in the lobby, and continues to ride to the lobby. it will take 2 seconds to move upwards or downwards between floors. draw out what this would like. how long long is each stop? what is the magnitude of each phase? (note: do not just give answer. i would love to truly understand the material. so, leave any explanations or notes on the side if possible