$\begin{array}{1 1}
(a)\;V_o= 1.1483S^{-1} \lambda = 26126\;\overset{\circ}{A}\\
(b)\;V_o= 1.1483\times10^{15}S^{-1} \lambda = 2612.6\;\overset{\circ}{A}\\
(c)\;V_o= 2.438\times10^{12}S^{-1} \lambda = 2634\;\overset{\circ}{A}\\
(d)\;V_o= 1\times10^{15}S^{-1} \lambda = 3642\;\overset{\circ}{A}\end{array}$