Question - Answer these questions separately:
1. What are the differences between Entity-Relationship (ER) Diagram notation and Entity-Relationship (ER) Grammar notation?
2. Based on payroll process on the value chain model of RSWS (textbook example), there are two economic exchange events: labor acquisition and cash disbursement.
a. Create ER Diagram for these two events?
b. Write ER grammar for the above economic exchange events?