Consider a discrete random variable X with the probability mass function fx given by

fx(-7) = 0.19

fx(-3) = 0.1

fx(-1) = 0.71

Find the values below

Accuracy must be 3 decimal places at least. (More is OK.)

(A)Find E(X)(the expectation of X)

(B)Find Var(X)(the variance of X)

(C)Find E(-0.7*X2+3.3*X+1)(expectation of-0.7*X2+3.3*X+1)