5 Let x be a random variable with pdf f(x) = x ≥ 5. Find the cdf of this distribution. O F(x) = 1-², x ≥ 2 20 F(x) = -², x ≥ 5 O F(x) = 1-5, x ≥ 5 x O F(x) = 1-1,x25 h