Project Name: ExtDomainModel Go back to the class exercise from Tuesday

• Copy the code to a new project

• Implement the CustomStringConvertible protocol on all types

define a "description" property of type String this property should return a human-readable version of the contents for example, Money should return "EUR22.0" (for amount 22.0 and currency EUR)

• Unit tests!

• Define a new protocol: Mathematics

mathematical operation methods (+, -) define it on Money write tests to verify that we can add and remove Money

• Unit tests!

• Use an extension to extend Double

add four new extension properties, USD, EUR, GBP, YEN each should return a Money each should convert the Double into a Money using "self" as the amount

• Unit tests!

Rubric