here is question 1.2 .3 . please help me finish it in 30 min. thx.

1. Let X be given by its distribution function F(x), such that F(x) = 0 if x 2 Find E(X) , Var(X), o(X) 2. The density function p(x) of random variable X is given by the graph below. p(x) 0.5 -0.5 0 0.5 1 1.5 2 2.5 3 a) Find P(0.5