Please help.

Round the correct answers to four decimal places, please.

Suppose the proportion X of surface area in a randomly selected quadrat that is covered by a certain plant has a standard beta distribution with a = 5 and [3 = 4. (a) Compute E(X) and V(X). (Round your answers to four decimal places.) E(X) = 0.5556 y V(X) = 0.0247 y (b) Compute P(X s 0.7). (Round your answer to four decimal places.) 0.8209 x (c) Compute P(0.7 s X s 0.9). (Round your answer to four decimal places.) 0.1649 x (d) What is the expected proportion of the sampling region not covered by the plant? (Round your answer to four decimal places.) 0.4444 '7