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

Stock Amount Invested Beta

A $$6,4801\mathrm{.}03$

B $$2,9201\mathrm{.}73$

C $$5,1600\mathrm{.}87$

a$.$

$1\mathrm{.}11$

b$.$

$\mathrm{.}86$

c$.$

$1\mathrm{.}02$

d$.$

$\mathrm{.}97$

e$.$

$1\mathrm{.}22$