Determining the boiling point of a substance given the triple point and critical point
What you need is the Clausius–Clapeyron equation, which is used to relate vapor pressure and temperature (or external pressure and boiling point).
$$\ln{\left(\dfrac{P_1}{P_2}\right)}=\dfrac{\Delta H_{\text{vap}}}{R}\left(\dfrac{1}{T_2}-\dfrac{1}{T_1}\right)$$
Step 1: Find the enthalpy of vaporizations $\Delta H_{\text{vap}}$ by plugging in the two sets of temperatures and pressures that you have.
Step 2: Use your $\Delta H_{\text{vap}}$ and the temperature and pressure of the triple point to determine the boiling temperature at 1 atm.