(a) Assuming no Fair Value Adjustment account balance at the beginning of the year, prepare the adjusting entry at the end of the year if Laura Companys available-for-sale debt securities have a fair value $60,000 below cost. (b) Assume the same information as part (a), except that Laura Company has a debit balance in its Fair Value Adjustment account of $10,000 at the beginning of the year. Prepare the adjusting entry at year-end