A large fish hangs from a spring balance supported from the

Question

Compute all parts of given question:

Question: A large fish hangs from a spring balance supported from the roof of an elevator.

Part A: If the elevator has an upward acceleration of 2.90m/s² and the balance reads 70.0N, what is the true weight of the fish?

Part B: Under what circumstances will the balances read 36.0N?

Part C: What will the balance read if the elevator cable breaks?

I need help to determine the true weight of the fish.