Answer 1

Function templates are special functions that can operate with generic types.
It's the mean , you can declare some containers that hold integers, floats, and other types to one function .
Maybe my code can help you;

https://code.sololearn.com/cFyO29c9sW7L/?ref=app

and article for you:
https://www.learncpp.com/cpp-tutorial/131-function-templates/