Textbook Problem

To which element does each of the following abbreviated electron configurations refer?

msp;  $\begin{array}{l}\text{a}.\left[\text{Ne}\right]\text{3}{s}^{\text{3}}\text{3}{p}^{\text{1}} \text{c}.\left[\text{Ar}\right]\text{4}{s}^{\text{2}}\text{3}{d}^{\text{1}0}\text{4}{p}^{\text{5}}\\ \text{b}.\left[\text{Ar}\right]\text{4}{s}^{\text{1}} \text{d}.\left[\text{Kr}\right]\text{5}{s}^{\text{2}}\text{4}{d}^{\text{1}0}\text{5}{p}^{\text{2}}\end{array}$