AT&T's financial statements for the 2010 and 2009 fiscal years contained the following information: 2010 2009 Balance Sheets ($ in millions) Current assets: Accounts receivable, net of allowances for doubtful accounts of $957 and $1.202 $13.610 $14,845 Income Statements ($ in millions) Revenues 2010 $124,280 2009 $122.513 In addition, the firm disclosed bad debt expenses of $1,334 million in 2010 and $1,762 million in 2009. Required: a. Determine the amount of actual write-offs made during 2010. [1 point] b. Determine the amount of cash collected from customers during 2010. [1 point)