A woman stands in an elevator that has a constant upward acceleration while the elevator travels upward a distance of 18.0 m. During the 18.0-m displacement, the normal force exerted by the elevator floor does 8.25 kJ of work on her and gravity does 7.35 kJ of work on her. a:What is the mass of the woman? b:What is the normal force that the elevator floor exerts on her? c:What is the acceleration of the elevator? Once again, I am clueless as how to approach this problem.