Chapter 9.5, Problem 9.4CP

What is the output of the following code?

int x = 50, y = 60, z = 70;

int *ptr = nullptr;

cout ≪ x ≪ " " ≪ y ≪ " " ≪ z ≪ endl;

ptr = &x;

*ptr *= 10;

ptr = &y;

*ptr *= 5;

ptr = &z;

*ptr *= 2;

cout ≪ x ≪ " "≪ y ≪ " " ≪ z ≪ endl;