correct answers please ! thank you

When you define a C++ class, which of the following are considered part of the implementation (there may be zero, one, or more correct answers): private member variables private member function declarations public member function declarations all member function definitions When you define a C++ class, which of the following are considered part of the interface (there may be zero, one, or more correct answers): private member variable declarations private member function declarations public member function declarations all member function definitions