A child pulls a 5 kg-object on a rough horizontal surface with an angle of 45°, a

A child pulls a 5 kg-object on a rough horizontal surface with an angle of $45^{\circ}$, as shown in the figure. $F = 20\sqrt{2}$ N. If the coefficient of kinetic friction between the object and the surface is 0.25, calculate acceleration of the object ($g = 10$ N/kg, $\sin 45^{\circ}= \cos 45^{\circ} = \frac{\sqrt{2}}{2}$)