$3\mathrm{.}3$ You've been hired as a junior database analyst for HelloWorld corporation and they're looking to redesign their internal database. The brief

they gave you had the following business rules. Employees at the corporation must belong to the technical, marketing or production

department. Each department must be chaired by an HOD. The HOD oversees the department and its employees. Employees can be managers

or normal employees. Normal employees must be programmers, UX designers or both.