The normal freezing point of n-octane (C8H18) is -57C. (a) Is the freezing of n-octane an endothermic

Question:

The normal freezing point of n-octane (C8H18) is -57°C.
(a) Is the freezing of n-octane an endothermic or exothermic process?
(b) In what temperature range is the freezing of n-octane a spontaneous process?
(c) In what temperature range is it a nonspontaneous process?
(d) Is there any temperature at which liquid n-octane and solid n-octane are in equilibrium? Explain.