Able orally agreed to pay Carr $800 to restore Able's antique car within 18 months, even though it was possible for him to complete the restoration in 10 months. The agreement is: a. unenforceable, because it covers services with a value in excess of $500. b. unenforceable, because it covers a time period in excess of one year. c. enforceable, because personal service contracts are exempt from the Statute of Frauds. d. enforceable, because the work could be completed within one year.

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.