Help is in ned

What’s #16 asking and how do i solve it?

Ahot-air balloon takes off from the ground traveling vertically with a constant upward acceleration of magnitude g/4. after time interval δt, a crew member releases a ballast sandbag from the basket attached to the balloon. how many seconds does it take the sandbag to reach the ground? (express your answer in terms of δt)

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?