Rosie runs a travel agency. She books flights, accommodation and tours. The diagram shown below is used to describe part of the database model used at Rosie's R&R Travel. Refer to the diagram and indicate which of the following statements is TRUE Customer Invoice Invoice Details Each invoice can have only one invoice detail The Infinity sign should not be used in an ER diagram by students undertaking this course This database model has only 3 attributes The relationship between customer and invoice is one to one