Design an E-R diagram on a computer for a worldwide package delivery company (e.g., DHL or FedEx) according following description:
The database must be able to keep track of customers. Each customer has a unique number, a name, and an address which consists of street (street_number, street_name, apt_number), city, state, and zip.
The database must be able to keep track of packages. Each package has a unique number, weight, and size.
Customers can send packages at some time. Customers may receive packages at some time.
The packages go through places. Each place has a unique identifying number, city, county, and local address. Many packages can be located in one place.