Any help will be appreciated,

In an experiment to determine the rate at which heat is extracted from a hot material, 305 g of the material at 90 °C is put into a 50 mm diameter copper vessel to a depth of 90 mm as shown below. The hot material and calorimeter are placed in a container holding 189 g of cold water at 22.7 °C. The temperature of the water is then measured every 30 seconds for 3minutes. The average temperature rise per second is calculated as 0.0065 ± 0.0005 °C/sec.
From the data provided, determine the average heat power ( in kW ) transferred to the water.
https://online.uts.edu.au/courses/1/...lorimeter2.jpg