<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _Sublimation_Pressure(T):
 """Sublimation Pressure correlation Parameters T : float Temperature, [K] Returns ------- P : float Pressure at sublimation line, [MPa] Notes ------ Raise :class:`NotImplementedError` if input isn't in limit: * 50 ≤ T ≤ 273.16 Examples -------- 8.947352740189152e-06 References IAPWS, Revised Release on the Pressure along the Melting and Sublimation Curves of Ordinary Water Substance, http://iapws.org/relguide/MeltSub.html. """

    if 50 <= T <= 273.16:
        Tita = T/Tt
        suma = 0
        a = [-0.212144006e2, 0.273203819e2, -0.61059813e1]
        expo = [0.333333333e-2, 1.20666667, 1.70333333]
        for ai, expi in zip(a, expo):
            suma += ai*Tita**expi
        return exp(suma/Tita)*Pt
    else:
        raise NotImplementedError("Incoming out of bound")