#### Answer

$a=\{ 10,12,14,16,... \}$

#### Work Step by Step

Integers are the negative, zero, and positive numbers which include $\{...,-3,-2,-1,0,1,2,3...\}$. Even integers are integers divisible by $2$. Hence, the even integers, $a$, greater than $8$ are
\begin{array}{l}\require{cancel}
a=\{ 10,12,14,16,... \}
.\end{array}