I need help with these chemistry questions please:?

1. The Hfus of ethanol (C2H5OH) is 4.60 kJ/mol. How many kilojoules are required to melt 20.5 grams of ethanol at its freezing point? and 2. A graduated cylinder contains 41.2 ML of water. A 45.6 g piece of metal is completely covered with water, the water rises to the 49.3 ML mark. What is the density of the metal. (d=m/v)