Stacking Cylinders Mechanics Question (from brilliant.org)

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Three cylinders, all of the same mass, are stacked on a table as shown in the figure. There is enough friction between the cylinders and the table such that the cylinders remain at rest. Let Fh be the horizontal force of the table on one of the cylinders and Fn be the normal force. When Fh is a minimum, what is the ratio Fh/Fn?enter image description here