chapter7
........\ex1.m
........\ex10.m
........\ex11.m
........\ex2.mdl
........\ex2sim.m
........\ex3.m
........\ex4.mdl
........\ex4sim.m
........\ex5.m
........\ex6.m
........\ex7.mdl
........\ex7sim.m
........\ex8.m
........\ex9.m