Explain how to solve

A $20kg$ block $(m_l)$ and a bucket with mass $m_2$ are connected by a light string that passes over a frictionless pulley as shown in Figure $2.$ The block lies on an inclined plane of angle, $=53\mathrm{.}1$ and the coefficient of kinetic friction between the block and the plane is $0\mathrm{.}40.$ Calculate the mass of the hanging bucket, $m_2$ if it is moving downward with the acceleration of $2\mathrm{.}67\frac{m}{s^2}.$