An article suggests the uniform distribution on the interval (7.5, 19) as a model for depth (cm) of the bioturbation layer in sediment in a certain region.

(a) what are the mean and variance of depth? (round your variance to two decimal places.) mean variance
(b) what is the cdf of depth? f(x) = 0 x < 7.5 7.5 ≤ x < 19 1 19 ≤ x