Suppose that X is a random variable whose density is f(x) = 1 / [2*(1 + |x|)^2] , (- inf < x< inf)

a) Draw the graph of f(x)

b) Find P(-1 < X < 2)

c) Find P(|X| > 1)

d) Is E(X) defined?

So I don't know about the other parts, but for part b is it just something like the integral from -1 to 2 of f(x)? Thanks for any help!!