Find and Simplify $f ( 4 ) + f ( 5 )$

Multiple Choice

Find and simplify $f ( 4 ) + f ( 5 )$ for the function $f ( x ) = \frac { x + 2 } { x - 3 }$ .

A) $f ( 4 ) + f ( 5 ) = 19$
B) $f ( 4 ) + f ( 5 ) = \frac { 23 } { 2 }$
C) $f ( 4 ) + f ( 5 ) = \frac { 23 } { 9 }$
D) $f ( 4 ) + f ( 5 ) = \frac { 19 } { 2 }$
E) $f ( 4 ) + f ( 5 ) = \frac { 9 } { 23 }$