Q.Normal Distribution (L04, CFA3) What are the mean and standard deviation of a standard normal distribution? Mean Standard Deviation Mean standard deviation ............. .........(25 marks) The comparative income statements of Arab Manufacturing Company are shown below. 2020 2019 2018 $38,610 $32,175 $25,740 25,100 19,950 15,400 $13,510 $12,225 $10,340 7,700 6,565 5,148 4.270 4.175 3,861 $11,970 $10,740 $9,009 Net sales Cost of sales Gross profit Selling expenses Administrative expenses Total operating expenses Operating income Interest expense Net income before tax Income taxes Net income $ 1,540 $ 1,485 $ 1,331 95 | 115 100 $ 1,425 $ 1,390 $ 1,231 655 $ 770 645 $ 745 541 $ 690 Required: a. Perform a vertical, common size analysis of the income statement data for Arab Manufacturing Company in columnar form, using sales as the base. b. Comment briefly on significant trends and relationships revealed by the computations, 11:52 PM