Determining Profit or Loss from an Investment. Two years ago, you purchased 220 shares of IBM stock for $124 a share. Today, you sold your IBM stock for $142 a share. For this problem, ignore commissions that would be charged to buy and sell your IBM shares and dividends you might have received as a shareholder. a. What is the amount of profit you earned on each share of IBM stock

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.