You own a stock portfolio invested $25$ percent in Stock Q$,35$ percent in Stock R$,18$ percent in Stock S$,$ and $22$ percent in Stock T$.$ The betas for these four stocks are $1\mathrm{.}3,0\mathrm{.}7,1\mathrm{.}4,$ and $0\mathrm{.}9,$ respectively. What is the portfolio beta? $($Do not round intermediate calculations. Round your answer zo $3$ decimal places.$)$