Forces and equilibrium — practice question

Blocks $P$ and $Q$, with masses $m\,\text{kg}$ and $5\,\text{kg}$ respectively, are joined by the ends of a light inextensible string. The string passes over a small smooth pulley fixed at the top of a rough plane inclined at $35^\circ$ to the horizontal. Block $P$ rests on the plane, while block $Q$ hangs vertically below the pulley (see diagram). The coefficient of friction between block $P$ and the plane is $0.2$.