A French investor buys $130$ shares of Teck for $$7,800($ $$60$ per share$).$ Over the course of a year, Teck goes up by $$8\mathrm{.}65.$

a$.$ If there is a $10$ percent gain in the value of the dollar versus the euro, what will be the total percentage return to the French investor?

$($Do not round intermediate calculations. Round the final answer to $2$ decimal places.$)$

Total percentage return $\%$

b$.$ Now assume the stock increases by $$10$ but the dollar decreases by $10$ percent versus the euro. What will be the total percentage return to the French investor? $($Round your final answer to the nearest whole percentage.$)$

Total percentage return $\%$