9. What will the following code print on the console? int main() { } int num = 4; cout < < (num & 3 == 0 ? "first" : "second"); return 0; a. second b. first c. There is a syntax error d. It will print nothing 10. When is it best to use a do..while loop? a. Never b. When we know exactly how many iterations the loop will execute c. When we have a counter-controlled variable d. If we have a statement inside the loop that must execute at least once