19.3 Xola has a curios shop where he sells traditional handmade crockery and utensils to customers. All customers, walk-in as well as corporate, pay for their purchases in full at the time of the sale. Xola keeps track of all his customers and, at this stage, does not track potential customers. He has a single bank account for his business and all business-related transactions. REQUIRED Draw an REA diagram for the revenue cycle of Xola's business. Include all entities and cardinalities. 19.4 Xola only purchases finished products from suppliers and pays his vendors in full when he purchases his items. He keeps track of possible suppliers, in case he cannot obtain products from his usual suppliers. All payments for purchases made are paid from Xola's business bank account. REQUIRED Draw an REA diagram for the revenue cycle of Xola's business. Include all entities and cardinalities. 19.5 Xola's curios shop has expanded to the point where he now needs to buy additional equipment and fixed assets. Xola is a cautious businessman and, at this stage, he orders single pieces of office equipment or fixed assets at a time and pays for each order in full at the time of purchase. The arrangement between Xola and his suppliers is that each individual order will be shipped separately. REQUIRED Draw an REA diagram for the ordering process described. Include all entities and cardinalities