Modify your ancient Lanchester model in Exercise 11-9 so that both sides receive re-enforcements as described in Exercise 11-10. The parameters of the re-enforcements, however, are different here: the mean times between x and y re-enforcements are respectively 5 and 4 hours, and the mean sizes of the re-enforcements to both sides is 5. As in Exercise 11-10, do ten replications and make entries in the Statistic data module that will produce an estimate of the probability that x wins (def ned here as x (500) . y (500)) and the expected f nal value of x ( t ) 2 y ( t ), which could be positive or negative. Depending on the probability distributions involved, this model does require simulation, since no analytical solution is available, unlike in Exercise 11-9.