Use arrows to describe an increase or decrease in equilibrium quantity

$($

Qo and equilibrium price

$($

Po

$)$

$$in the middle columns given the "events" described for the Following markets. If the resulting impact on price or quantity cannot be determined, use a question mark in place of arrows. In the last column, describe whether the event affects the supply

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side, the demand

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side of the market or both sides of the market.

Market C$.$ An increase in the price of gasoline and an improvement in car production technology: