Questions: ⌟ ⌟ 1 ⌟ ⌟ 1 1 1 b-∧d b- b d

Transcript text: \begin{tabular}{|l|l|l|l|} \hline & & $\lrcorner$ & $\lrcorner$ \\ \hline & & 1 & $\lrcorner$ \\ \hline & & $\lrcorner$ & 1 \\ \hline & & 1 & 1 \\ \hline$b-\wedge d$ & $b-$ & $b$ & $d$ \\ \hline \end{tabular}