1. What is the main difference between a pro-forma invoice and a commercial invoice? (5 Marks) 2. Please list the three categories of documents and give two examples each. (10 Marks) 3. What is the main difference between an exporter letter of credit draft and a bill of exchange? Please provide an example of this. (5 Marks) 4. What are the inherent risks with partial and instalment payments? (5 Marks) 5. What is the difference between the Customs Invoice and Commercial Invoice