The following disclosure note appeared in the July $27,2019,$ annual report of Cisco Systems, Incorporated.Note $9$: Available$-$for$-$Sale Debt Investments and Equity Investments $($in part$)$Available$-$for$-$sale investments as of July $27,2019,$ and July $28,2018,$ were as follows:In millions$7/27/20197/28/2018$Adjusted CostGross Unrealized GainsGross Unrealized LossesFair ValueAdjusted CostGross Unrealized GainsGross Unrealized LossesFair ValueU.S$.$ government securities$ $808$$ $1$$ $(1)$$ $808$$ $7,318$$$ $(43)$$ $7,275$U$.$S$.$ government agency securities$169169732(5)727$Corporate debt securities$19,188103(29)19,26227,76544(445)27,364$U$.$S$.$ agency mortgage$-$backed securities$1,4257(11)1,4211,488(53)1,435$Non$-$U$.$S$.$ government and agency securities $209(1)208$Total$ $21,590$$ $111$$ $(41)$$ $21,660$$ $37,512$$ $44$$ $(547)$$ $37,009$Note $9$ also indicates that, during $2019,$ the net realized losses on sales of available$-$for$-$sale investments were $$13$ million. Ciscos Note $16($Comprehensive Income$)$ indicates unrealized holding gains of $$560$ million during $2019,$ as well as reclassification of $$13$ for losses that had previously been included in AOCI and recorded in the fair value adjustment but which were now being included in net income after being realized upon sale.Required:Prepare a T$-$account that shows the change between the July $28,2018,$ and July $27,2019,$ balances for the fair value adjustment associated with Ciscos AFS investments for fiscal $2019.$ By how much did the fair value adjustment change during $2019?$