Player $1$ has two options: L and R$.$ If Player $1$ chooses L$,$ then the game ends with payoffs for Player $1$ and $2$ equal to $(0$; $0).$ If Player $1$ chooses R$,$ then Player $2$ has two options; she can choose Y or N$.$ If Player $2$ chooses Y payoffs are $(0$; x$)$ and if she chooses N payoffs are $(1$; $2).$