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3. [-/7 Points] DETAILS LARCAAPCALC2 13.5.028. Find the critical points, relative extrema, and saddle points of the function. (If an answer does not exist, enter DNE.) (x, y) = x3 + y3 - 9x2 + 12y2 + 27x + 48y+ 43 Relative maximum of f(x, y) = DNE at (x, y) = ( DNE Relative minimum of f(x, y) = DNE at (x, y) =( DNE Saddle point of f(x, y) = at (x, y) = ( List the critical point for which the Second-Partials Test fails. (x, V) = (] Need Help? Read It Watch It Submit Answer Viewing Saved Work Revert to Last Response 4. [-/2 Points] DETAILS LARCAAPCALC2 13.5.040. Find p1 and p2, the prices per unit (in dollars), so as to maximize the total revenue R = X1P1 + *2P2 where x1 and x2 are the numbers of units sold, for a retail outlet that sells two competitive products with the given demand functions. x1 = 2000 - 4p1 + 2p2, X2 = 1500 + 4p1 - 3p2 P1 = $ P2 = $ Need Help? Read It Watch It 5. [-/2 Points] DETAILS LARCAAPCALC2 13.5.042. A corporation manufactures candles at two locations. The cost of producing x1 units at location 1 is C1 = 0.02x12 + 4x1 + 900 and the cost of producing x2 units at location 2 is -2 = 0.05x2