I need help with two Chemistry questions please.

1.  The ΔG for the freezing point at H2O(l) at -10 °C is -210 J/mol, and the heat of fusion of ice at this temperature is 5610 J/mol.  Find the entropy change of the universe when 1 mol of water freezes at -10 °C.

2.  Which statement is true?

a.  A reaction in which the entropy of the system increases can be spontaneous only if it is exothermic.

b.  A reaction in which the entropy of the system increases can be spontaneous only if it endothermic.

c.  A reaction in which the entropy of the system decreases can be spontaneous only if it is exothermic.