If we form a portfolio that is invested $60\%$ in Fast Semiconductor stock that has a beta of $2\mathrm{.}25$ and $40\%$ in the risk$-$free asset, what will be the beta for the portfolio?

a$)2\mathrm{.}25$

b$)0\mathrm{.}00$

c$)1\mathrm{.}35$

d$)1\mathrm{.}75$