! Required information [The following information applies to the questions displayed below.] Trinity Brands recently disclosed the following: A summary of the Allowance for Doubtful Accounts is as follows (dollars in thousands): Allowance Balance at Beginning Balance at Additions for Doubtful (Charges) End of Accounts of Period to Expense Year 1 Year 2 Year 3 $ 108 156 76 $ ? Write-Offs $ Period 13 $ 156 182 ? 76 17 22 71 2-a. Compute the missing dollar amounts for year 1. 2-b. Compute the missing dollar amounts for year 2.