Question 1. The ER model, provided below, contains errors and is incomplete. You need to identify the errors/omissions, rectify them, and then redraw the diagram,

Question 1                                                                                                                    5 Marks

The ER model, provided below, contains errors and is incomplete.  

You need to identify the errors/omissions, rectify them, and then redraw the diagram, so that the redrawn ER model illustrates the entities and relationships for a Strata unit model with the following requirements:

• a building can have many strata units
• each building must have its address recorded
• a strata unit is situated in one building only
• an owner can own many strata units
• an owner can have many contact numbers
• a strata unit can be owned by many owners
• each owner’s percentage owning of the strata unit must be recorded
• building, owner and strata unit are identified by their respective ids

Note: If you have any additional assumptions, mention them along with your redrawn diagram.