Using the INVOICE table structure shown below, do the following: a. Draw its dependency diagram, and identify all dependencies, including all partial and transitive dependencies. You can assume that the table does not contain repeating groups and that any invoice number may reference more than one product. (Hint. This table uses a composite primary key.) b. Remove all partial dependencies, draw the new dependency diagrams, and identify the normal forms for each table structure you created. c. Remove all transitive dependencies and draw the new dependency diagrams. Also, identify the normal forms for each table structure you created