Q$8)$ Consider the following computation done in $Z_{11}.$ What is $2^{-1}+3^{-1}+4^{-1}+5^{-1}$

$($A$)6$

$($B$)7$

$($C$)0$

$($D$)9$

$6+4+3+9$

$=>12+15=27$