$(5)$ What are the impacts from bus manufacturing for the electric bus $($excluding the battery$)?$

Your results should be in terms of environmental impact per functional unit. In this case, that

means $kgC\frac{O_2}{?}$ passenger$-$mile traveled.

$(6)$ What are the impacts from electricity used to power the electric bus, in terms of kg

$C\frac{O_2}{?}$ passenger$-$mile traveled?

$(7)$ What are the impacts from bus maintenance for the electric bus, in terms of kg

$C\frac{O_2}{?}$ passenger$-$mile traveled?

$(8)$ What are the impacts from battery manufacturing used to power the electric bus, in terms of

$kgC\frac{O_2}{?}$ passenger$-$mile traveled?

$(9)$ What are the impacts from charging infrastructure for the electric bus, in terms of kg

$C\frac{O_2}{?}$ passenger$-$mile traveled?

$(10)$ What are the total $C{O}_2$ burdens per passenger mile traveled for the electric bus?

every final answer to a question must be in CO$2/$passenger miles!!