If a student is looking for the degree symbol (°) and it is not found on the main drop-down of symbols, what should the student do next?

the student should look for a shortcut to that symbol.
the student should click more symbols.
the student should click symbols.
the student should find the symbol on the keyboard.

4. what is the reason for including the following code snippet in the header file animal.h? #ifndef animal_h #define animal_h class animal { public: animal(); animal(double new_area_hunt); void birth(); void hunt(double new_area_hunt); void death(); double get_area_hunt() const; private: double area_hunt; }; #endif