Zach whose mass is 70kg is in an elevator descending at

Question

Compute all parts of given question:

Question: Zach, whose mass is 70kg, is in an elevator descending at 12m/s. The elevator takes 4.0s to brake to a stop at the first floor.

Part A: What is Zach apparent weight before the elevator starts braking?

Part B: What is Zach apparent weight while the elevator is braking?

I need help to find Zach apparent weight before the elevator starts braking.