Q.4. What is the total payment amount we received from Customer 102? -Which TABLES do you need and how they are LINKed? -What are the conditions? - Which fields do you want to see? Q.5. There are times where customers would pay less than the invoice amount. Display the amount difference of invoice 1002. -Which TABLES do you need and how they are LINKed? What are the conditions? Which fields do you want to see