Answer
\begin{equation}
\begin{array}{|c|c|}\hline & {\text { Answer }} \\ \hline a & {6} \\ \hline b & {-1} \\ \hline c & {0} \\ \hline d & {-6} \\ \hline e & {-8} \\ \hline f & {1} \\ \hline\end{array}
\end{equation}
Work Step by Step
\begin{equation}
\begin{array}{|c|c|}\hline & {\text { Answer }} & {\text { Reason }} \\ \hline a & {6} & { because\ 1110 → 14 - 8\ } \\ \hline b & {-1} & { because\ 0111 → 7 - 8\ } \\ \hline c & {0} & { because\ 1000 → 8 - 8\ } \\ \hline d & {-6} & { because\ 0010 → 2 - 8\ } \\ \hline e & {-8} & { because\ 0000 → 0 - 8\ } \\ \hline f & {1} & { because\ 1001 → 9 - 8\ } \\ \hline\end{array}
\end{equation}