D Find the variance 5 of the following data Х 1 2. 5 3 2 2 I 1 Frequency b) 1.2 a) 2.3 c) 5.6 d) 4.5 e) 3.4 data 2) Find the median of the following 1 3 7 13 17 X Frequency 7 3 2 5 3 1 d) 5 b) 3 c) a