Some Values of a Function and Its 3-Unit Moving Average

Multiple Choice

Some values of a function and its 3-unit moving average are given. Supply the missing information: $$\begin{array} { | l | l | l | l | l | l | l | l | } \hline \boldsymbol { x } & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\\hline \boldsymbol { r } ( \boldsymbol { x } ) & 2 & 3 & & 14 & & 4 & 20 \\\hline \text { average } & \text { undefined } & \text { undefined } & 5 & & 11 & & \\\hline\end{array}$$

A) $\begin{array} { | l | l | l | l | l | l | l | l | } \hline \boldsymbol { x } & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\\hline r ( x ) & 2 & 3 & 10 & 14 & 9 & 4 & 20 \\\hline \text { average } & \text { undefined } & \text { undefined } & 5 & 9 & 11 & 9 & 11 \\\hline\end{array}$
B) $\begin{array} { | l | l | l | l | l | l | l | l | } \hline \boldsymbol { x } & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\\hline \boldsymbol { r } ( \boldsymbol { x } ) & 2 & 3 & 10 & 14 & 9 & 4 & 20 \\\hline \text { average } & \text { undefined } & \text { undefined } & 5 & 9 & 11 & 9 & 11 \\\hline\end{array}$
C) $\begin{array} { | l | l | l | l | l | l | l | l | } \hline \boldsymbol { x } & 1 & 2 & 3 & 4 & 5 & 6 & 7 \\\hline \boldsymbol { r } ( \boldsymbol { x } ) & 2 & 3 & 10 & 14 & 9 & 4 & 20 \\\hline \text { average } & \text { undefined } & \text { undefined } & 5 & 9 & 11 & 12 & 14 \\\hline\end{array}$