The price of Microsoft is $30 per share and that of Apple is $58 per share. The price of Microsoft increases to $39 per share after one year and to $42 after two years. Also, shares of Apple increase to $66 after one year and to $71 after two years. If your portfolio comprises 100 shares of each security, what is your portfolio return over year 1 and year 2? Assume no dividends are paid. A) 19.32%, 7.62%
B) 28.01%, 8.38%
C) 23.18%, 11.43%
D) 22.22%, 13.71%

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.