From the given functions that are mapped from Z to Z$,$ identify the onto functions. $($Check all that apply.$)$

Check All That Apply

f$($n$)=$ n $1$

f$($n$)=$ n $1$

f$($n$)=$ n$2$

$+1$

f$($n$)=$ n$2+1$

f$($n$)=$ n$3$

f$($n$)=$ n$3$

f$($n$)=$n$2$

f$($n$)=$ n$2$