Hot Water (HW) is a small start-up company that sells spas. Using the following description of its business operations, build an ERD.

HW does not carry any stock. A few spas are set up in a simple warehouse so customers can see some of the models available, but any products sold must be ordered at the time of the sale.

HW can get spas from several different manufacturers, and each manufacturer produces one or more different brands of spas.

Each brand is produced by only one manufacturer but has one or more models.

Every model is produced as part of a brand. For example, Iguana Bay Spas is a manufacturer that produces Big Blue Iguana spas, a premium-level brand, and Lazy Lizard spas, an entrylevel brand. The Big Blue Iguana brand offers several models, including the BBI-6, an 81-jet spa with two 6-hp motors, and the BBI-10, a 102-jet spa with three 6-hp motors.

Every manufacturer is identified by a manufacturer code. The company name, address, area code, phone number, and account number are kept in the system for every manufacturer.

For each brand, its name and level (premium, mid-level, or entry-level) should be stored.

For each model, the model number, number of jets, number of motors, horsepower per motor, suggested retail price, actual retail price, dry weight, water capacity, and seating capacity must be stored.