Task $8$: Write and execute the command to retrieve the average square footage and average monthly rent for each property for which the average monthly rent is greater than $$1,400.$

Task $9$: Without using the MONTHLY$\_$RENTS VIEW, write and execute the command to retrieve the average square footage and average monthly rent for each property for which the average monthly rent is less than $$1,400.$

Task $10$: User Oliver must be able to retrieve data from the PROPERTY table.

Task $11$: Users Crandall and Perez must be able to add new owners and properties to the database.

Task $12$: Users Johnson and Klein must be able to change the monthly rent of any property.

Task $13$: All users must be able to retrieve the office number, monthly rent, and owner number for every property.