1. What does make's -n option do?

2. Why does updating the timestamp on a source code file cause make to recompile it?

3. How is a target in the makefile related to a dependency in the source code?

4. When a line in main.cpp is changed from this:

cout << "The factorial of 5 is " << factorial(5) << endl;

to this:

cout << "The factorial of 6 is " << factorial(6) << endl;

Factorial.cpp get recompiled, when using make? Why?

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