Question $2(8$ marks$)$

Consider the following conceptual schema of an operational database owned by a multinational real estate company. The database contains information about the real estate properties offered for sale, owners of the properties, potential buyers who are interested in the properties and real estate agents involved in selling of the properties.

Whenever a property is put on a market by an owner, a description of the property is entered into an operational database. Whenever a property is purchased, its description is removed from an operational database.

The real estate company would like to create a data warehouse to keep information about the finalized real estate transactions, properties involved in the transactions, sellers$/$owners$,$ and agents involved in the real estate transactions. The real estate company would like to use a data warehouse to implement the following classes of analytical applications.

$(1)$ Find the total number of real estate properties sold per month, year, street, city, country, agent involved.

$(2)$ Find an average asked price of real estate properties sold per month, year, street, city, country, agent involved.

$(3)$ Find an average final price of real estate properties sold per month, year, street, city, country, agent involved.

$(4)$ Find an average period of time on the marked of real estate properties sold per month, year, street, city, country, agent involved.

$(5)$ Find the total number of times each real estate property has been sold in a given period of time.

$(6)$ Find the total number of buyers interested in purchases of real estate properties sold per day, month, year, street, city, country, agent involved.

Note, the operational database does not contain all information necessary to implement the classes of applications listed above. Additional information must be added when data is transferred from an operation database to a data warehouse.

Your task is to create a conceptual schema of the planned data warehouse. To draw a conceptual schema, use a graphical notation explained to you in a presentation $11$ Conceptual Data Warehouse Design.

DRAW IT OUT FOR ME$,$ WITH EXPLANATION PLEASE THANKS