Question 7 Quenching is the process of immersing a hot metal object in a bath for a specified time to obtain certain properties such as hardness. A copper sphere 25 mm

in diameter, initially at 300°C, is immersed in a bath at 0°C. The following table gives measurements of the sphere's temperature versus time. Find a functional description of these data using commands, not GUI. Plot the function and the data on the same plot. Time, s 0 Temperature C 300 1 150 Table Q7-Quenching process 3 35 2 75 4 12 5 5 6 2 [8 marks]