You read in the Wall Street Journal that $30$ day T$-$bills are currently using $6\mathrm{.}5\%$ your brother$-$in$-$law a broker safe and sound securities has given you the following estimates of current and interest$-$rate premiums inches premium $2\mathrm{.}25\%$ equity premium $\mathrm{.}6\%$ maturity risk premium $1\mathrm{.}8\%$ default risk premium $2\mathrm{.}15\%$ on the basis of the starter what is the real risk free rate of return