Consider a Solow economy with a constant savings rate (s) and with exogenous population growth and technological change. Output (Y) is produced by labor (N) and capital (Kt) inputs through a Cobb-Douglas technology, Y = ANK-a, where 0 < a < 1, Nt+1 (1 + 9N) Nt, and At+1= (1 +9A) At. (1) Ignore for simplicity the depeciation factor and use the capital accumulation equation (Kt+1 sY = sAN K-a) to show that the dynamics of the capital-effective-labor ratio, defined as t can be described by the first-order difference equation Kt = A/N below: = Zt+1 = ezt 1-a " where = S (1+gA) /a (1 +9N) = Plot the relation between Zt and Zt+ in the (Z, Zt+1) plane. (*)