Advanced Data ModelingProject descriptionGiven the following business scenario, create a Crow?s Food ERD using a specialization hierarchy if appropriate. Granite Sales Company keeps information on employees and the departments inwhich they work. For each department, the department name, internal mail box number, and the office phone extension are kept. A department can have many assigned employees, and eachemployee is assigned to only one department. Employees can be salaried, hourly or work on contract. All employees are assigned an employee number, which is kept along with the employee?sname and address. For hourly employees, hourly wages and target weekly work hours are stored; for example, the company may target 40 hours/week for some employees., 32 for others, and 20for others. Some salaried employees are salespeople who can earn a commission in addition to their base salary. For all salaried employees, the yearly salary amount is recorded in the system.For salespeople, their commission percentage on sales and commission percentage on profit are stored in the system. For example, John is a salesperson with a base salary of $50,000 per yearplus 2 percent commission on the sales price for all sales he makes, plus another 5 percent of the profit on each of those sales. For contract employees, the beginning date and end date of theircontracts are stored along with the billing rate for their hours.
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