a$)$ How much electricity is used, on average, by an air conditioner in $5$ years?

Express your answer rounded to the nearest hundredth of a kilowatt$-$hour.

$$ kW$-$hr

b$)$ How much carbon dioxide is emitted into the atmosphere to produce this slectricity? Express your answer rounded to the nearest tenth of a pound of carbon dioxide.

$$ Ib of $C{O}_2$