Find E(x), E(x²), the mean, the variance, and the standard deviation of the random variable whose probability density function is given belo 1 1152*, (0.48) E(x) = (Type an integer or a simplified fraction.) E(x²)=(Type an integer or a simplified fraction.) (Type an integer or a simplified fraction.) ²= (Type an integer or a simplified fraction.) =(Type an exact answer, using radicals as needed.) g= f(x)=