Answer
\begin{array}{rl}
{b} & {1} & {0} & {1} & {b} \\
{ } & {} & {} & {\uparrow} & {} \\
{ } & {} & {} & {2} & {}
\end{array}
Work Step by Step
\begin{array}{rl}
{b} & {1} & {0} & {1} & {b} \\
{ } & {} & {} & {\uparrow} & {} \\
{ } & {} & {} & {2} & {}
\end{array}