a management science 301student is comparing the returns of two investment alternatives, alternative A and Alternative B, in order to select one of them for investment. Return in dollars for the two alternatives in the last 5 months is given by For A returns are 180,195,150,150,165 For B returns are 240,180,300,405,-20 1) considering the returns of A, what is the mode? 2) what is the sample standard deviation of returns of A? 3) choose the right option : the standard deviation of returns of B is a) higher than A. b) lower than A c) equal to A . d) lower than A but not significantly lower . e) none of the options