Rotation is Stationary

A disc of radius $12\text{ cm}$ is free to rotate about point $O.$ As shown in the bottom right of the diagram, a rope wound around the disc is pulled with a force of $F = 10 N.$

At point $C$ , a light rod $AC$ is attached to the disc, which rests on the fixed support at point $B$ .

Given $BC = 30 \text{ cm}, AB = 15 \text{ cm}, OC = 4 \text{ cm},$ find the force $F_0$ (in Newtons) required to apply to the left end of the rod so that the whole system remains in balance.