为下面定义的Radio画出一个可行的存储布局。解释其中的虚函

class Transmitter : public virtual Storable {
public:
  void write();
  // ...
};
class Receive : public virtual Storable {
public:
  void write();
  // ...
};
class Radio : public Transmitter, public Receive {
public:
  void write();
  // ...
};