Please help me with this question, thanks

A rod with a mass of M and length L is positioned near a wall at an angle of 8 with the ground. The coefficient of static friction between the rod and the ground is , and the friction between the rod and the wall can be neglected. A ball of mass m is moving upward along the rod with initial velocity u from point A without any friction. In part (a) to (c), we are assuming that u is sufficiently large enough so that the rod does not slide. (a) What is the acceleration of the ball along the rod? (b) What is the minimum initial velocity u such that the ball can reach the point B? (c) How long does the ball take to reach the point B? Now, we would like to find the minimum value of the coefficient of static friction such that the rod does not slide during the motion of the ball. We consider the moment when the ball is moving upward and located at a distance of d from point A. (d) What is the normal force acting on the ball? (e) What 1s the normal force acting on the rod at point A? (f) What is the normal force acting on the rod at point B? (g) What is the friction force acting on the rod at point A? (h) Find the minimum value of # such that the rod does not slide during the motion of the ball