Using Table $5\mathrm{.}3$ as your guide, what is your estimate of the expected annual HPR on the market index stock portfolio if the current risk$-$free interest rate is $5\mathrm{.}7\%?($Round your answer to $2$ decimal places.$)$TABLE $5\mathrm{.}3$ Risk and return of investments in major asset classes, $1927-2018$