If a 700 N man stands on ice skates for which the area of contact with the ice is 10 mm2, by how many degrees is the melting point of the ice lowered? (The latent heat of fusion is 6.01 × 103 J/mole. At the melting point, the density of ice is 0.917 g/cm3, and that of liquid water is 0.9999g/cm3. The molecular weight of water is 18.)