The very small tumor of initial size M is observed every 10 days, and over each ten-day period, it has grown 50% larger. (a) Write the formula representing size of tumor after t days (t = 0, 10, 20, . . .) (b) On which day will we ultimately observe that tumor is more than 10 times its original size? (Suppose that observations are strictly periodically performed as specified.) day c) How many times greater than original size will tumor be on day 100?