Reconsider the linearly constrained convex programming model given in Prob. 13.9-9. Follow the instructions of parts (a), (b), and (c) of Prob. 13.9-10 for this model, except use (x1, x2) = (1/2, 1/2) as the initial trial solution and use r = 1, 10-2, 10-4, 10-6.