Problem $13-11$ Calculating Portfolio Betas $($LO$4)$

You own a stock portfolio invested $35\%$ in Stock Q$,10\%$ in Stock R$,35\%$ in Stock S$,$ and $20\%$ in Stock T$.$ The betas for these four stocks are $0\mathrm{.}84,1\mathrm{.}17,1\mathrm{.}08,$ and $1\mathrm{.}36,$ respectively. What is the portfolio beta? $($Do not round intermediate calculations. Round the final answer to $3$ decimal places.$)$

Portfolio beta