can you help?

A rocket ship flies in a vertical circular path of radius 2000.00 m at constant speed. A passenger on board is standing on a set of scales. The passenger's mass is 100.00 kg. a) What is the net force on the passenger when the reading on the scales is zero. [1 Mark] b) What is the speed of the rocket if the reading on the scales is zero. [2 Marks] c) What is the speed of the rocket if the reading on the scales is 50.00 kg. [2 Marks]