void SetFirst(Int_t first) {fFirst=first;}
void SetLast (Int_t last ) {fLast =last;}
Int_t GetFirst() const {return fFirst;}
Int_t GetLast () const {return fLast;}
Float_t Rate() const {return fRate;}
void SetFirst(Int_t first) {fFirst=first;}
void SetLast (Int_t last ) {fLast =last;}
Int_t GetFirst() const {return fFirst;}
Int_t GetLast () const {return fLast;}
Float_t Rate() const {return fRate;}