Work Step by Step
When we reverse the digits of $9779$, we get $9779$. This means that $9779$ is a palindromic number. $9779$ is not an even number. A - the set of palindromic numbers B - the set of even numbers $9779$ belongs in A but not in B; therefore, it belongs in the region that is inside of the circle for A but not the circle for B: the $I$ region.