Security.CostFair value at $12/31/21$X$$130,000$$$160,000$Y$100,00090,000$Z$175,000125,000$$$405,000$$$375,0005$Time left $0$:$33$:$37$HideOn its December $31,2020$ balance sheet, Carbon Company appropriately reported a $$10,000$ debit balance in its Fair Value Adjustment account. There was no change during $2021$ in the composition of Carbon's portfolio of debt investments held as available$-$for$-$sale debt securities$.$ The following information pertains to that portfolio:What amount of unrealized loss on these debt securities should be included in Carbon's stockholders' equity section of the balance sheet at December $31,2021?$