Four bricks of length L, identical and uniform, are stacked on top of one another (the figure) in such a way that part of each extends beyond the one beneath. Find, in terms of L, the maximum values of (a) a1, (b) a2, (c) a3, (d) a4, and (e) h, such that the stack is in equilibrium. -L Enter your answer as - L, where a and b stand for an integer. For example, - 12 (a) (b) (c) (d) (e)