A physics student immerses one end of a copper rod in boiling water at 100C and the

Question:

A physics student immerses one end of a copper rod in boiling water at 100°C and the other end in an ice-water mixture at 0°C. The sides of the rod are insulated. After steady-state conditions have been achieved in the rod, 0.160 kg of ice melts in a certain time interval. For this time interval, find
(a) The entropy change of the boiling water;
(b) The entropy change of the ice-water mixture;
(c) The entropy change of the copper rod;
(d) The total entropy change of the entire system.