If a microwave provides 975 watts of heating power, how many minutes of heating are needed to raise the temperature of a 50.0-gram piece of frozen food from -20.0 degrees celsius to a liquid at 35.0 degrees celsius?

(C solid = 1.045 kJ/kg degrees C) (Lf = 167 kJ/kg) (C liquid = 2.093 kJ/kg degrees C)