QUESTION 19 Use the delete operator only on pointers that were O never used not correctly initialized created with the new operator O dereferenced inappropriately O None of these QUESTION 20 What does the following statement do? double "num2; o declares a double variable named num2 o declares and initializes an pointer variable named num2 O initializes a variable named num2 o declares a pointer variable named num2 O None of these QUESTION 21 What will the following code output? int numbers-new int[5] for (int i = 0; i