Hot Water (HW) is a small start-up company that sells spas. 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.

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, Iguana Bay Spas is a manufacturer that produces Big Blue Iguana spas, a premium-level brand, and Lazy Lizard spas, an entry-level 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, the brand name and 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, num- ber of horsepower per motor, suggested retail price, HW retail price, dry weight, water capacity, and seating capacity must be kept in the system.

The problem is modified to include additional information provided below. Make sure to read the book problem first then consider the information below: The Hot Water Company is not allowed to purchase spas from manufacturers but is allowed to purchase them from Vendors. Only vendors can order from manufacturers. 1. A vendor sells one or many brands of spa and a brand is sold by zero, one or many vendors. A vendor may not sell every brand. 2. A vendor buys zero, one or many brands of spa from a manufacturer and a manufacturer sells zero, one or many brands of spa to a vendor. Your final solution must adhere to good DB design principles. You will be graded as if you are a consultant on the job. Your solution must be thorough, complete, and subscribe to good design. No missing tables, attributes, keys, etc. See Section 6.4 Improving the Design for inspiration.

DELIVERABLE NEEDED TO BE SOLVED:

A 3NF relational schema (final solution only; only 3NF tables must be shown) with all the required tables, attributes, etc.