Exercise $2$: Draw UML Class diagrams for the following Online Ordering

System:

Employees: for each employee it keeps a unique ID number, first and last names, and a date of birth.

Customers: for each customer it keeps a unique ID number, first and last names, phone number, and a location where they are located.

Used parts being sold by the company: it keeps ar unique part number, part name, and price.

Orders: each order is placed by one customer. Customer can create many orders, add items $($parts$)$ to the order, track the order's progress, or cancel it$.$ Each order must have one or more parts. An order is delivered by at least one employee. A unique order number, order date, and shipping date are recorded. Each part can be ordered only once.