If you have an investment portfolio which is a mix of stock and bonds, with the stocks having a return of $1\mathrm{.}2\%$ and the bonds having a return of $3\mathrm{.}5\%,$ then what is the expected return of the portfolio if it contains $30\%$ stocks?

$0\mathrm{.}825\%$

$1\mathrm{.}89\%$

$2\mathrm{.}35\%$

$2\mathrm{.}81\%$