If X and Y are random varisbles with variances oX2=6 and oY2=7,X and Y are not independent, and XY=1, then find the variance of the random variable Z=3X+5Y2 (Simpinity your ansiner)The probabiitios are 0.44, 0.48,0.3, and 0.08 , respectively, that a delegylo to a certan corventicn arrived by selected at this convention, 5 arrived by air, 4 artived by bus, 1 artived by asdomoble, and 2 amived by train? The probabiity is (RRound to four decimal places as needed).