Muhammad holds $3$ securities in his portfolio:

$\backslash$table$[[$Security$,$Market Value Expected Return,Beta,$],[$MG Corp,$$10,000,20\%,1\mathrm{.}3],[$TC Corp,$$3,000,-10\%,1],[$PH Corp,$$8,000,12\%,\mathrm{.}8]]$

What is the expected return on the overall portfolio?

a$)7\mathrm{.}3\%$

b$)15\mathrm{.}55\%$

c$)12\mathrm{.}66\%$

d$)9\mathrm{.}37\%$