As of February 4, 2020, the BBC reported 20,673 confirmed cases of COVID19 were reported in mainland China. The data for confirmed cases at that time was shown to follow firstorder exponential growth. The virus was expected to result in death for 2% of those people infected and the rate of infection was reported to double every 6.4 days. (a) How many cases of infection do you estimate to occur in 1 week time from February 4th?