Answer:
1. Fk = 24N, Fs = 60N
2. Fk = 60N, Fs = 84N
For 3, is it saying the car weighs 9000N? In that case, you’d convert Newtons to kg. then you’d find normal force by using Fn = mg (because Fn = mass x gravity) finally since you’ve found Fn, use Fk=ukFn and Fs=usFn to find kinetic and static friction.
Explanation: My work is in the picture below. Hope this helps!