A simple Contact Management software has the following features: -

1. A Contact consists of a Customer.
2. Customer and Contact are created separately. If the Contact is deleted, you have to ensure that the Customer for the Contact will remind in the system for future use.
3. Each Contact, at most, consists of only one Customer because at any given time, the Contact cannot represent multiple customers. However, Customer can have multiple Contacts.
4. The Contact records information such as email address, phone number, and multiple Addresses.
5. For any Contact, not all information is compulsory. However, the user must fill in at least one of the fields between email address, phone number, and Address.
6. The Address should be recorded as street, town/city, state, postcode, and country.

Your task is to model the software. Complete the class diagram that consists of all the classes in the software, the relationships between the classes, and multiplicity specifications.