You own a stock portfolio invested $35$ percent in Stock Q$,25$ percent in Stock R$,25$ percent in Stock S$,$ and $15$ percent in Stock T$.$ The betas for these four stocks are $\mathrm{.}83,1\mathrm{.}21,1\mathrm{.}22,$ and $1\mathrm{.}39,$ respectively. What is the portfolio beta? $($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

Portfolio beta