the following items are back to cement. 10 company for 2020: inventory 2019= 1,900,000 , net sales=20,350,000, tax= 750,000 , EBT= 4,750,000, retain earning= 1000,000, paid in capital= 11,300,000, profit for preferred stocks= 25% ,A/R 2020= 630,000, preferred stocks = 5000,000, capital surplus= 50,000, gross profit = 7,000,000, inventory 2020= 2,100,000, based on this items solve the (following: (b1 Average storage period and explain the - 1 (result? (4 points (calculate ROE ratio? (2 points -2 What profit margin ratio measures in -3 (general? (2 points assume that the expect return for housing. 11 bank stock in 2022 15% with probability 30%, in 2023 -8% with probability 15% , and in 2024 25% with probability 45% measure the (following: (c1 the expected return for all years of housing -1 (bank stock? (2 points the risk of stock for housing bank? (3 -2 (points