The base class Pet has private data members petName, and petAge. The derived class Dog extends the Pet class and includes a private data member for dogBreed. Complete main() to:

Why was Marsden Hartley considered one of the forerunners of the Modern Art movement? His use of images and fragments to speak symbolically about the subject was a revolutionary approach to art. ... Their focus on the darker side of humanity was radically different than mainstream art at the time.

Explanation:

Why was Marsden Hartley considered one of the forerunners of the Modern Art movement? His use of images and fragments to speak symbolically about the subject was a revolutionary approach to art. ... Their focus on the darker side of humanity was radically different than mainstream art at the time.