Kop Corporation's $5-$year bonds yield $6\mathrm{.}50\%,$ and T$-$bonds with the same maturity yield $3\mathrm{.}00\%.$ The default risk premium for Kop's bonds is DRP $=0\mathrm{.}40\%,$ the liquidity premium on Kop's bonds is LP $=3\mathrm{.}10\%$ versus zero on T$-$bonds, the inflation premium $($IP$)$ is $1\mathrm{.}50\%,$ and the maturity risk premium $($MRP$)$ on $5-$year bonds is $0\mathrm{.}40\%.$ What is the real risk$-$free rate, $r^{**}?$

$1\mathrm{.}10\%$

$1\mathrm{.}01\%$

$1\mathrm{.}21\%{?}^{**}$

$1\mathrm{.}14\%$

$0\mathrm{.}99\%$