Question 8 (a) What is the purpose of the virtual keyword in C++? [2 marks] (b) What is object slicing, and why could using pure virtual functions avoid this problem? [4 marks] (c) Briefly describe the output of the following program and how it would, or would not, change if the member variable message was removed from the class Child? #include class Parent public Parent) message"Parent"; h void display) 1 std: : cout std: :string message int main( Parent *cnew Child c->display) return 0; [4 marks] [Total for Question 8: 10 marks]