the midpoint between two points has the following formula
[tex](\frac{x1+x2}{2},\frac{y1+y2}{2})[/tex]replace in the formula using P as point 1 and Q as point 2
[tex]\begin{gathered} (\frac{6+4}{2},\frac{4+3}{2}) \\ (\frac{10}{2},\frac{7}{2}) \\ (5,\frac{7}{2}) \\ (5,3.5) \end{gathered}[/tex]