C++ QUESTIONS PLS ANSWER ASAP

- of QUESTION 3 1. Explain the concept of abstract class and pure virtual method. How do they relate to each other? (6 marks) b. Consider Program C-3. 1 // Program C-3 2 3 finclude 1 using namespace std; 5 6 int manu() int choice; B cout "; 12 13 cin >> choice; cout 2) throw 3.0; return choice: 22 int main() int choice = nenud 26 27 28 30 * fcholce 11 cout