1. The problem statement, all variables and given/known data Two uniform, 75.0-g marbles 2.00 cm in diameter are stacked as shown in Fig. P11.75 in a container that is 3.00 cm wide. (a) Find the force that the container exerts on the marbles at the points of contact A, B, and C. (b) What force does each marble exert on the other? 2. Relevant equations T = F*l = 0 F = ma = 0 3. The attempt at a solution I just cannot figure out the geometry of this problem, at all, which I need to even begin the question. How do I know where the point of contact of the two marbles is?