A quadratic function $f ( x )$ satisfies $f ( 0 ) = 0$ and the following conditions.\\
(가) $\int _ { 0 } ^ { 2 } | f ( x ) | d x = - \int _ { 0 } ^ { 2 } f ( x ) d x = 4$\\
(나) $\int _ { 2 } ^ { 3 } | f ( x ) | d x = \int _ { 2 } ^ { 3 } f ( x ) d x$\\
Find the value of $f ( 5 )$. [4 points]