Find the mid point of the line joining the points (1,2,3) and (–2,4,2)

Given points be
 $\begin{array}{l}\mathrm{A}(1,2,3),\mathrm{B}(-2,4,2)\\ \begin{array}{lllll}{\mathrm{x}}_1{\mathrm{y}}_1& {\mathrm{z}}_1& {\mathrm{x}}_2& {\mathrm{y}}_2& {\mathrm{z}}_2\end{array}\end{array}$
Midpoint of $\overline{\mathrm{AB}}$
$\begin{array}{l}=\left(\frac{{\mathrm{x}}_1+{\mathrm{x}}_2}{2},\frac{{\mathrm{y}}_1+{\mathrm{y}}_2}{2},\frac{{\mathrm{z}}_1+{\mathrm{z}}_2}{2}\right)\\ =\left(\frac{1-2}{2},\frac{2+4}{2},\frac{3+2}{2}\right)\\ =\left(\frac{-1}{2},3,\frac{5}{2}\right)\end{array}$