Suppose that in the situation depicted in Figure 10-3, the observer on the ground saw th...

Suppose that in the situation depicted in Figure 10-3, the observer on the ground saw the rear paint can explode before the front one. For the observer in the van, is it possible that the two explosions occurred (a) simultaneously, (b) in the order as observed from the ground, or (c) in the reverse order as observed from the ground? Explain.