Jim Angel holds a $$200,000$ portfolio consisting of the following stocks:

$\backslash$table$[[$Stock$,$Investment,Beta$],[$A$,$$$50,000,1\mathrm{.}70],[$B$,$$$50,000,0\mathrm{.}80],[$C$,$$$50,000,1\mathrm{.}00],[$D$,$$$50,000,1\mathrm{.}20],[$Total$,$$$200,000,],[,,]]$

What is the portfolio's beta? Do not round your intermediate calculations.

$1\mathrm{.}434$

$0\mathrm{.}999$

$1\mathrm{.}246$

$1\mathrm{.}175$

$1\mathrm{.}210$