A 10-cm diameter copper ball is to be heated from 100C to an average temperature of 150C in 30 minutes. Taking the average density and specific heat of copper in this temperature range to be l = 8950 kg/m and Cp = 0.395 kJ/kg C, respectively, determine (a) the total amount of heat transfer to the copper ball, (b) the average rate of heat transfer to the ball, and (c) the average heat flux.