Natasha, nelson, and nikolai are all looking to buy flashlights for a camping trip. natasha is willing to pay $4, nelson is willing to pay $10, and nikolai is willing to pay $20. if the actual price of a flashlight turns out to be $15, what is the total consumer surplus for these three shoppers?

David consumes two things: gasoline (q 1) and bread (q 2). david's utility function is u(q 1, q 2)equals70q 1 superscript 0.5 baseline q 2 superscript 0.5. let the price of gasoline be p 1, the price of bread be p 2, and income be y. derive david's demand curve for gasoline. david's demand for gasoline is q 1equals nothing. (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 _ character.)