The inflation rate over the past year was $3\mathrm{.}5$ percent. If an investment had a real return of $8\mathrm{.}7$ percent, what was the nominal return on the investment?

Multiple Choice

$5\mathrm{.}02\%$

$4\mathrm{.}78\%$

$13\mathrm{.}20\%$

$12\mathrm{.}50\%$

$13\mathrm{.}89\%$