 
                             540 minutes
                                        540 minutes                                     
                             2 hours 30 minutes
                                        2 hours 30 minutes                                     
                             3 hours
                                        3 hours                                     
                             2 hours
                                        2 hours                                     
                             5 to 6 hours
                                        5 to 6 hours                                     
                             7 to 8 hours
                                        7 to 8 hours