(1) whats wrong with line 3?

(2) whats wrong with the constructors?

(3) whats wrong with the function setC()?

(4) whats wrong with the destructor?

(5) whats wrong with line 19?

(6) whats wrong with line 20?

1 class A 2 private: 3 int a = 1, b, c, d, *ptr; 4 public: A) int ptrnew int [10) ) A(int b0) this->b(b) I) void setA (int x) const axi void setB(int x) this.b x; ) void setC() { this->c = ptr [0]; } void setD (int x) d xi ) A (int *x) ( 9 10 delete ptr; 12 13 1 4 15 16 void main() 17 const A al; 18 A a2 (1, 2, 3) 19 al.setD (6) 20 cout