A) convert the following numbers to binary and hexadecimal.

43 139

b) convert the following 2 numbers to 5 bit 2's complement numbers (1 sign bit and 4 other bits) and add them.

-9 +14

c) how can overflow in signed 2's complement addition be detected?

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