Consider the optimal solution of the LP problem below occurs at x1 = 1.5, x2 = 2, and answer the following four questions. 1. What is the range of optimality for the FIRST objective function coefficient (c1; currently \"6\")? 2. What is the range of optimality for the SECOND objective function coefficient (c2; currently \"9\")? 3. What is the dual value for the FIRST constraint? 4. What is the dual value for the SECOND constraint