K3. Masses mi, my, m3 and om are connected together as shown in the figure below. All the surfaces are smooth. If mi = 3. 2kg, m2 = 2. 8kg, m3 = 3. 8kg, om = 1. 3kg and 0 = 550, calculate a) the acceleration of the system; [3 points] b) the normal force between my and om. [2 points]