$5-$year Treasury bonds yield $6\mathrm{.}00\%.$ The inflation premium $($IP$)$ is $2\mathrm{.}10\%,$ and the maturity risk premium $($MRP$)$ on $5-$year bonds is $0\mathrm{.}5\%.$

What is the real risk$-$free rate, r$*?$

a$\mathrm{.}3\mathrm{.}40\%$

b$\mathrm{.}5\mathrm{.}50\%$

c$\mathrm{.}5\mathrm{.}39\%$

d$\mathrm{.}3\mathrm{.}3\%$

e$\mathrm{.}3\mathrm{.}90\%$