K3. Masses mi, M2, my and om are connected together as shown in the figure below. +om All the surfaces are smooth. If mi = 3. 2kg, my = 2. 8kg, my = 3. 8kg, om = 1. 3kg and 0 = 550, calculate a) the acceleration of the system; [3 points] b) the normal force between ma and om. 12 pointsl