Hi need help again :( sorry but uh it’s all in the pic <3

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Pls will give brainliest and all p.s u can zoom in if u cant see plss

Which graph represents the solution set for the given system of inequalities? x+2y< 3 x+y> 4 3x-2y> 4