Assume Eric Sanchez saves $$85$ a month by using coupons and doing comparison shopping. a$.$ What is the annual savings amount? b$.$ What would be the future value of this annual amount over $7$ years, assuming an interest rate of $5$ percent? $($Exhibit $1-$A$,$ Exhibit $1-$B$,$ Exhibit $1-$C$,$ Exhibit $1-$D$)$ Note: Use appropriate factor$($s$)$ from the tables provided. Round time value factor to $3$ decimal places and final answers to $2$ decimal places.