David consumes two things: gasoline (9₁) and bread (92). David's utility function is U(91-92)=600142 Let the price of gasoline be p₁, the price of bread be p₂, and income be Y. Derive David's demand curve for gasoline. David's demand for gasoline is (Properly format your expression using the tools in the palette. Hover over tools to see keyboard shortcuts. E.g., a subscript can be created with the 5p₁ Y character.) With recent increases in the price of gasoline, does David reduce his consumption of gasoline? The effect of a change in the price of gasoline on David's gasoline consumption is 091 Y (Property format your expression using the tools in the palette.) 2 op₁ 5p₁ As the price of gasoline increases, David's demand for gasoline decreases 0.2 0.8 With recent increases in the price of gasoline, does David reduce his consumption of gasoline? The effect of a change in the price of gasoline on David's gasoline consumption is 291 (Property format your expression using the tools in the palette.) op₁ 5p₁ As the price of gasoline increases, David's demand for gasoline decreases 20₁ For David, how does -depend on his income? That is, how does David's change in gasoline consumption due to an increase in the price of gasoline depend on op₁ ²0₁ op, dy his income level? To answer this question, find the cross-partial derivative, The effect of a change in income on the effect of a change in the price of gasoline on David's gasoline consumption is # (Property format your expression using the tools in the palette.)