A solid conducting sphere of radius \(a\) carrying an initial net charge of \(+2Q\) is positioned concentrically inside a thin spherical conducting shell of radius \(b\) (where \(b > a\)) carrying an initial net charge of \(-Q\). A thin conducting wire with an open switch connects the inner sphere to the shell. The switch is closed until electrostatic equilibrium is reached, and then reopened. Which of the following options correctly identifies the final net charge on the inner sphere and the final charge on the outer surface of the shell?