Newton's law of cooling says that the temperature of a body changes at a rate proportional to the difference between its temperature and that of the surrounding medium (the ambient temperature), where T = the temperature of the body (C), t = time (min), k= the proportionality constant (per minute), and Ta = the ambient temperature (C). Suppose that a cup of coffee originally has a temperature of 68C. Use Euler's method to compute the temperature from t = 0 to 10 min using a step size of 1 min if Ta = 21C and k = 0.1/min.