Home Appliance Corporation contracts with Instate Trucking Company to take a selection of appliance repair parts to Journey Airlines, Inc., with Journey to transport the goods to a KeepSafe Company warehouse. Instate Trucking, Journey Airlines, and KeepSafe each acknowledge possession of the goods by a document of title. Instate Trucking, Journey Airlines, and KeepSafe are

David consumes two things: gasoline (g) and bread (b). david's utility function is u(g, b) = 10g^0.25 b^0.75. use the lagrange technique to solve for david's optimal choices of gasoline and bread as a function of the price of gasoline, p_g, the price of bread, p_b, and his income m. with recent decrease in the price of gasoline (maybe due to external shock such as shale gas production) does david increase his consumption of gasoline? for david, how does partial differential g/partial differential p_g depend on his income m? that is, how does david's change in gasoline consumption due to an increase in the price of gasoline depend on his income level? to answer these questions, find the cross-partial derivative, |partial differential^2 g/partial differential m partial differential p_g.