E8.17 (LO 1) AN The following information (in millions) was taken from the December 31 financial statements of Canadian National Railway Company: Accounts receivable, gross Allowance for doubtful accounts Accounts receivable, net Revenues Total current assets Total current liabilities 2019 $1,241 2018 $1,195 2017 $1,000 28 26 16 1.213 1,160 984 14.917 14.321 13.041 2.830 2,728 2.100 4.287 3500 3.983 Instructions a. Calculate the 2019 and 2018 current ratios, b. Calculate the receivables turnover and collection period for 2019 and 2018. e. Comment on any improvement or weakening in CN's liquidity and its management of accounts receivable.