7. A probability density function of a random variable is given by f(x) below. Find the mean, variance, and standard deviation. f(x) = 5 if x≥1 otherwise The mean is μ = (Type an integer or decimal rounded to two decimal places as needed.) A probability density function of a random variable is given by f(x) below. Find the median. f(x) = if 1 sxse² 2x 0 otherwise The median value is m= (Round to two decimal places as needed.)