6. The second order partial derivative values are given for three critical points of the function z = h(x, y). Classify each of these points (local maximum or minimum, saddle). If not enough information is given, state so as your answer. a. fxx = -2.2, fyy = -3.1, fxy = 2.9 (2) b. fxx = 5.4, fyy = -4.7 (2) c. fxx = 3.1, fyy = 2.2, fxy = -2.5 (2) 7. Determine the bounds of integration for a function z = f (x, y) over the pictured domain region for both orders of integration. Give the answers as integrals with the ntegration bounds and order clearly indicated