You own a stock portfolio invested $31$ percent in Stock Q$,13$ percent in Stock R$,39$ percent in Stock S$,$ and $17$ percent in Stock T$.$ The betas for these four stocks are $1\mathrm{.}00,1\mathrm{.}06,1\mathrm{.}46,$ and $1\mathrm{.}91,$ respectively. What is the portfolio beta?

Note: Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,32\mathrm{.}16.$

Portfolio beta