please look at what is wrong i keep getting the same answer

You have endured D'out of 2 parts correctly A wrecking yard inventor wants to pick up cars by charging 2 0:06 m diameter bull and inducing an equal and opposite charge on the car. If a car hava 2893 kg maw and the ball is to be able to lift it from a distance of 3.41 me a) What minimum charge must be used? 6.64 -103 b) What is the electric field near the surface of the ball 3.64 106 NC