1. Define a class with a custom initialize routine.
2. Set instance variable attributes from initialize.
3. Include a default argument for an initialize argument.

You're going to be building a Person class that accepts a person's name when a person is initialized. You're also going to be building a Dog class that accepts a dog's name and breed on initialization. If no value for the dog's breed is provided, it should default to "Mutt"

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Define a Person class in lib/person.rb that provides an #initialize method that accepts an argument for the person's name. That argument should be stored within a @name instance variable.

Define a Dog class in lib/dog.rb that provides an #initialize method that accepts an argument for the dog's name. That argument should be stored within a @name instance variable.

Additionally, Dog#initialize should accept a second optional argument for the dog's breed stored in an instance variable @breed. When none is provided, it should default to "Mutt".

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