Function F Is $$f ( x ) = \left\{ \begin{array} { l l } 6 x & \text { if } 0 \leq x < 7 \\1 & \text { if } 7 \leq x < 14\end{array} \right.$$

Function f is $$f ( x ) = \left\{ \begin{array} { l l } 6 x & \text { if } 0 \leq x < 7 \\1 & \text { if } 7 \leq x < 14\end{array} \right.$$
Find $f ( 12 )$ .

A) 72
B) 1
C) 78
D) 66
E) 84