Based on this information, you can say that the overall "price level" . A. remained unchanged during the year since the average price for the three goods stayed the same at $ 7.33. B. increased since cashews are now more expensive than almonds and pecans. C. stayed the same since the price of cashews increased but the price of almonds fell. D. there is not enough information to determine the change in the overall price level.

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.