Define a class RobotArm that includes a data component, handOpen, that is either true or false and another private data member, position, that is a position in three dimensions. Include three constructors, a default constructor, a constructor that takes 2 parameters (one for the hand state and one for the position) and a constructor that takes four parameters (the hand state and the x, y, z coordinates of the position ). Assume that your program includes the definition of class Position3D defined above.

What will be an ideal response?

```
class RobotArm { public:
RobotArm () {}
RobotArm( bool, const Position3D& );
RobotArm( bool, double, double, double );
private:
bool handOpen;
Position3D position;
};
RobotArm :: RobotArm( bool handState, const Position3D& aPosition )
{
handOpen = handState;
position = aPosition;
}
RobotArm :: RobotArm( bool handState, double x1, double y1, double z1 )
{
handOpen = handState;
position = Position3D( x1, y1, z1 );
}
```