A student stands on a bathroom scale in an elevator at rest

Question

A student stands on a bathroom scale in an elevator at rest on the 64^th floor of a building. The scale reads 845 Newton.

(a) As the elevator moves up, the scale reading increases to 946 Newton. Estimate what the acceleration of the elevator.

(b) As the elevator approaches the 74^th floor, the scale reading drops to 782 Newton. Estimate what is the acceleration of the elevator?