1. (15 points) A firm produces f(L)=L+L units of a commodity when L units of labor are employed. The price obtained per unit is p and the price per unit of labor is w. (a) What is the profit function (L ) ? (b) Find the value of L for which (L)=0. (c) Use the second-derivative test and show the value of L that you calculated in part (b) maximizes the profit..