Let X denote the proportion of allotted time that a randomly selected student spends working on a certain aptitude test. Suppose the pdf of X is f(x; u) 5 5 (u 1 1)xu 0 # x # 1 0 otherwise where 21 , u. A random sample of ten students yields data x1 5 .92, x2 5 .79, x3 5 .90, x4 5 .65, x5 5 .86, x6 5 .47, x7 5 .73, x8 5 .97, x9 5 .94, x10 5 .77. a. Use the method of moments to obtain an estimator of u, and then compute the estimate for this data. b. Obtain the maximum likelihood estimator of u, and then compute the estimate for the given data.