 
                             8 hours
                                        8 hours                                     
                             8 hours
                                        8 hours                                     
                             4 hours
                                        4 hours                                     
                             4 hours
                                        4 hours                                     2 hours
                                        2 hours                                     
                             40 to 55 minutes
                                        40 to 55 minutes                                     
                             1 hour
                                        1 hour