Create the complete ERD that contains all primary keys, foreign keys, and main attributes from the following information. Lake Shore Medical Center wants to keep track of all administrative appointments, including dates of appointment and dates of termination (Hint: Time-variant data is at work). The medical Center administrator may want to know how many department directors worked in each of the 7 departments between January 1, 1965 and December 31, 2021, and who was the IT Director in 2015. Given this information..