MATLAB programming assignment. I need explanations with code. One question 4 parts.

Question 2 Tea Cooling Problem Suppose we measure the change in the temperature of a cup of tea every minute. We find that it changes roughly at the rate k, so that we can describe the dynamics as a difference equation as follows Here Tn is the temperature of the tea at time n and k is the rate of cooling. For simplicity, we will assume room temperature is zero. Hint: Be careful to re-write this equation in our usual form