1- Explain why you need to develop dependency graphs which include views and database objects such as stored procedures when we already have logical and physical data models. How do dependency graphs and data models differentiate?
2-Through your recent work, you implemented a new stored procedure, while stored procedures can be helpful, they can also present challenges to data stability. Assume the following scenario is true; A stored procedure that  exports health data from the EmployeePersonal table was running, and another stored procedure that reformats emergency contact phone data could also be running.
a) Assume we just executed the stored procedure you have created for this assessment while the other two 
stored procedures were also running and an error occurred. Give an example of a dirty read, a 
nonrepeatable read, and a phantom read among this group of stored proceed.