Consider the following function. $($If an answer does not exist, enter DNE.$)$

f$($x$)=1+$

$7$x

$$

$8$x$2$

$$

$($a$)$

Find the vertical asymptote$($s$).($Enter your answers as a comma$-$separated list.$)$

x $=$

Find the horizontal asymptote$($s$).($Enter your answers as a comma$-$separated list.$)$