Suppose the current spot rate of $CHF=$$$0\mathrm{.}6543.$ Current $1-$year forward rate for $CHF=$$$0\mathrm{.}6808.1-$year interest rate in the U$.$S$.=7\mathrm{.}5\%.1-$year interest rate in the Switzerland $=3\mathrm{.}5\%.$ If the spot rate of CHF one year latter turn out to be $$0\mathrm{.}6400$ then uncovered rate of return from the Swiss point of view would be:

$9\mathrm{.}90\%$

$1\mathrm{.}24\%$

$5\mathrm{.}15\%$

$5\mathrm{.}81\%$