Which of the given data sets is less variable? a. 1,2,2,3,3,3, 4, 4, 4,4 b. 1,2,3,4,5,6,7,8 O c. 1,1,1,4,5,8,8,8 d. d. 1,1.5, 2, 2.5, 3, 3.5, 4,4.5 e. 1,1,1, 1,8,8,8,8 e f. 1,1,2,4,5,7,8,8 g. 1,1,2,2,3,3,4,4 h. -1, -0.75, -0.5, -0.25,0,0,0,0.25, 0.5, 0.75, 1 i. None j. 1,-1,2, -2,3, -3,4,-4 Assume the average inflation rate per year in a three- year period is 30%. If the inflation rates in the first and the third years were 10% and 25%, respectively, what was it during the second year? (Write the required rate in decimal form to be rounded to the nearest thousandth. Put 0 before decimal point if needed.) - Letting a and b be two positive real numbes such that ab = 1, which of the followings is true? In what follows, (HM) (a,b).(AM)(a,b) and (GM)(a, b) represent the Harmonic, Arithmetic and Geometric means of a and b. Select one or more: a. (GM)(a, b) 1 c. None d. (HM) (a, b) . (AM)(a, b) 1