\item \points{3} Construct a reduced ordered binary decision diagram (ROBDD) for the formula

$$f = (p \lor q) \land \neg (p \land q) \land r$$

using \textit{variable order} $q < p < r$. Use complemented edges and a node for \texttt{true} as the only constant node. To simplify drawing, you may assume that \textit{dangling edges} point to the constant node. Write down all cofactors that you compute to obtain the final result and mark them in the graph.
