What is the beta of a portfolio comprised of the following securities$?$

$\backslash$table$[[$Stock$,$Amount Invested,Security$],[$A$,$$$5,400,1\mathrm{.}72],[$B$,$$$6,400,1\mathrm{.}83],[$C$,$$$8,900,1\mathrm{.}00]]$

Multiple Choice

$1\mathrm{.}517$

$1\mathrm{.}444$

$1\mathrm{.}830$

$1\mathrm{.}720$

$1\mathrm{.}000$