SCENARIO: Bubbly Tubs is a small company that sells hot tubs and spas online. Bubbly Tubs does not carry any stock, although it does keep a few spas in a small warehouse so they can take pictures, thus allowing clients to see some of the models available in creative settings. Sales, however, are handled by clients placing orders online that they can either pick up from the warehouse or that are shipped to them directly from the manufacturer. Here is a description of operations. Help identify the necessary entities with attributes, and relationships for these operations, list it out.

Bubbly Tubs gets spas from several different manufacturers. . Each manufacturer produces one or more different brands of spas. .Each and every brand is produced by only one manufacturer. Every brand has one or more models. Every model is produced as part of a brand. For example, suppose Interlake Spas is a manufacturer that produces Aah-Experience spas, a premium-level brand, and Lazy Bones spas, an entry-level brand. The Aah-Experience brand offers several models, including the AE-6 (an 81-jet spa with two 6-horsepower motors) and the AE-10 (a 102-jet spa with three 6-hp motors). Every manufacturer is already identified by a manufacturer code. The company name, address, area code, phone number and Bubbly Tub's account number with the manufacturer are kept in the system for every manufacturer. For each brand, the brand name, brand level (premium, mid-level, or entry-level) are kept in the system For each model, the model number, number of jets, number of motors, number of horsepower per motor, suggested retail price, Bubbly Tubs retail price, dry weight, water capacity, and seating capacity must be kept in the system