Newton's laws of motion — practice question

Two particles, with masses $5\,\text{kg}$ and $10\,\text{kg}$, are joined by a light inextensible string passing over a fixed smooth pulley. The $5\,\text{kg}$ particle lies on a rough fixed slope inclined at an angle of $\alpha$ to the horizontal, where $\tan\alpha = \frac{3}{4}$. The $10\,\text{kg}$ particle hangs beneath the pulley (see diagram). The coefficient of friction between the slope and the $5\,\text{kg}$ particle is $\frac{1}{2}$. The particles are released from rest.