Transform the following UML to relational model. Include primary keys and foreign keys in the answer diagram.

\begin{tabular}{|l|} \hline \multicolumn{1}{|c|}{ Rooms } \\ \hline +RoomNo: int \\ +Location: string \\ \hline \end{tabular} \begin{tabular}{|l|} \hline \multicolumn{1}{|c|}{ Bill } \\ \hline +BillNo: string \\ +PatientName: string \\ +Amount: float \\ \hline \end{tabular}