Seven identical dominoes (i.., blocks) each of mass m=1kg are to be stacked in three columns and pushed across a frictionless ice rink by a horizontal 10-N force.Assume dominoes do not slip w.r.t. each other. How many dominoes should be in each column, with a minimum of one, (a) to maximize the acceleration of the dominoes, (b) to maximize the force on column C due to column B, (c ) to maximize the net force on column B due to column A and C, and (d) to maximize the force on column B due to column A?