A small sphere of radius $r_1$ and charge $q_1$ is enclosed by a spherical shell of radius $r_2$ and charge $q_2$. Show that if $q_1$ is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge $q_2$ on the shell is.

Question

$\begin{array}{1 1} Positive \\ negative \\ \text{may be positive or negative} \\ \text{none of the above}\end{array}$