5. Now, let's look at question 4 using the tools of Chapter 21. Again, assume y = f(11, 12) where f(x) is concave and CRS. Use the tools of cost minimization, duality, and "two-step" profit maximization discussed in class to do the following: (111) show consider the long-run profit maximization using the two step ap- proach. What is the FOC for choosing optimal profit maximizating output? At that optimal output level y* (p, w) for the two step profit maximum problem, how do we recover the factor demands x1(p,w) and x3(p,w)? (iv) Show that factor demands for the long-run "one-step" profit maximiza- tion approach in Question 4 are the same as the factor demands of the long-run "two step" profit maximization problem here. 5. Now, let's look at question 4 using the tools of Chapter 21. Again, assume y = f(11, 12) where f(x) is concave and CRS. Use the tools of cost minimization, duality, and "two-step" profit maximization discussed in class to do the following: (111) show consider the long-run profit maximization using the two step ap- proach. What is the FOC for choosing optimal profit maximizating output? At that optimal output level y* (p, w) for the two step profit maximum problem, how do we recover the factor demands x1(p,w) and x3(p,w)? (iv) Show that factor demands for the long-run "one-step" profit maximiza- tion approach in Question 4 are the same as the factor demands of the long-run "two step" profit maximization problem here