Sensor Technology wishes to determine its coefficient of variation as a company over time. The firm projects the following data (in millions of dollars): Year Profits: Expected Value Standard Deviation 1 $90 $31 3 120 52 6 150 83 9 200 146 a) compute the coefficient of variation (V) for each time period. b) does the risk (V) appear to be increasing over a period of time? If so, why might this be the case