A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 826 N. (a) As the elevator moves up, the...

A student stands on a bathroom scale in an elevator at rest on the 64th floor of a building. The scale reads 826 N. (a) As the elevator moves up, the scale reading increases to 958 N. Find the acceleration of the elevator. (b) As the elevator approaches the 74th floor, the scale reading drops to 782 N. What is the acceleration of the elevator?