Find a Formula for the Function Graphed $f ( x ) = \left\{ \begin{array} { l l } 2 , & 0 \leq x < 6 \\ 6 , & 2 \leq x < 8 \end{array} \right.$

Find a formula for the function graphed.
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A) $f ( x ) = \left\{ \begin{array} { l l } 2 , & 0 \leq x < 6 \\ 6 , & 2 \leq x < 8 \end{array} \right.$
B) $f ( x ) = \left\{ \begin{array} { l l } 6 , & 0 \leq x < 6 \\ 2 , & 2 \leq x < 8 \end{array} \right.$
C) $f ( x ) = \left\{ \begin{array} { l l } 2 , & 0 \leq x \leq 2 \\ 6 , & 2 < x \leq 4 \\ 2 , & 4 < x \leq 6 \\ 6 , & 6 < x \leq 8 \end{array} \right.$
D) $f ( x ) = \left\{ \begin{array} { l l } 2 , & 0 \leq x < 2 \\ 6 , & 2 \leq x < 4 \\ 2 , & 4 \leq x < 6 \\ 6 , & 6 \leq x < 8 \end{array} \right.$