\"\"

\

The coordinates are (5, 9), (12, 18).

\

Apply midpoint formula: midpoint = \"\".

\

\"\"   (Substitute \"\")

\

\"\"                (Add: \"\")

\

= (8.5, 13.5)                   (Divide: \"\")\"\"

\

The midpoint is (8.5, 13.5).