$1.$ You will create $2$ Classes, one for author information and one for book. Refer to bullet points below on the names that you are to assign for each class.

$$ Create a Author class. This class is to have the following attributes

o$$ author$\_$name $($must be defined when instance is created$)$

o$$ books $($a list of Book instances. Assign this attribute an empty list as a default value. Meaning passing a list of instances when creating an Author instance shouldn$$t be required. If not passed, the instance will reference an empty list.

o$$ all attributes must be protected

$$ Create a Book class. This class is to have the following attributes

o$$ book$\_$name$($must be defined when instance is created$)$

o$$ year$\_$pub$($must be defined when instance is created$)$

o$$ price$($must be defined when instance is created$)$

o$$ quantity$($must be defined when instance is created$)$

o$$ total $($automatically created when instance is created. Is the result of quantity multiplied by price$)$

o$$ all attributes must be protected

$2.$ Define necessary methods for each one of the two classes, should include the following