A Its returns to three watts are 10 , %20, %30 %B Its return for three years is 5, %25, %30 % Find the yield, range, now standard deviation, variance, coefficient of variation The third question : If we have two investments A, B A Its returns to three watts are 10, %20, %30 %B Its return for three years is 10 , %30, %40 % Find the yield, range, now standard deviation, variance, coefficient of variation