 
                             1 hour
                                        1 hour                                     
                             40 to 90 minutes
                                        40 to 90 minutes                                     
                             30 minutes
                                        30 minutes                                     
                             1 to 2 hours
                                        1 to 2 hours                                     
                             60 to 120 minutes
                                        60 to 120 minutes                                     
                             30 minutes
                                        30 minutes