5. A 0.01kg cube slides around the inside of a vertically oriented tube at a constant rate. The tube, shown in the figure, is 0.12m in diameter. The coefficient of static friction between the tube and the cube is 0.8. A) Determine the magnitude of the frictional force required for the cube to stay at the same height. B) Use your answer from part a) to determine the magnitude of the normal force acting on the cube. 12 cm C) Use your answer from part b) to find the minimum speed required for the cube to stay at the same height.