Each of the three plates has a mass of 10 kg. If the coefficients of static and kinetic friction at each surface of contact are 0.3 and 0.2, respectively, determine the acceleration of each plate when the three horizontal forces are applied. (the three plates are stacked on top of eachother, the bottom plate has a horizontal force of 15 N to the left, the middle plate has a horizontal force of 100 N to the right, and the top plate has a horizontal force of 18 N to the left.)