An isolated neutral iron atom (
\(\text{Fe}\), \(Z = 26\)) in the gas phase has the ground-state electron configuration \([\text{Ar}]\, 4s^2 3d^6\). The atom undergoes three successive ionizations to produce \(\text{Fe}^+\text{(g)}\), \(\text{Fe}^{2+}\text{(g)}\), and \(\text{Fe}^{3+}\text{(g)}\). Which of the following correctly predicts the ground-state electron configurations of \(\text{Fe}^{2+}\) and \(\text{Fe}^{3+}\), and identifies the subshell from which the third electron is removed?