Which of the following is a difference between extrinsic rewards and intrinsic rewards? a. Unlike intrinsic rewards, extrinsic rewards are offered to employees by the management for doing something well. b. Unlike intrinsic rewards, extrinsic rewards are intangible. c. Examples of extrinsic rewards include a sense of accomplishment and a sense of responsibility, whereas examples of intrinsic rewards include pay and promotions. d. Extrinsic rewards are not visible to others in a company, whereas intrinsic rewards are visible to everyone working in a company.

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.