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  1. \item Use the DPLL algorithm with BCP and PL to determine whether or not the set of clauses given is satisfiable. Decide variables in alphabetical order starting with the \textit{negative} phase.\\
  2. If the set of clauses resulted in \texttt{SAT}, give a satisfying model. If the set of clauses resulted in \texttt{UNSAT}, give a resolution proof that shows that the conjunction of the clauses from the table is unsatisfiable.
  3. \begin{dpllCNFInput}
  4. \item (a \lor b)
  5. \item (a \lor c)
  6. \item (d \lor e)
  7. \item (\lnot b \lor \lnot c)
  8. \item (e \lor \lnot f)
  9. \item (\lnot d \lor \lnot f)
  10. \item (d \lor \lnot f)
  11. \item (b \lor e)
  12. \item (a \lor \lnot f)
  13. \end{dpllCNFInput}