At many golf clubs, a teaching professional provides a free 10-minute lesson to new customers. A golf magazine reports that golf facilities that provide these free lessons gain, on average, $1,900 in green fees, lessons, or equipment expenditures. A teaching professional believes that the average gain is not $1,900, Complete parts a through c below. a. In order to support the claim made by the teaching professional, what null and alternative hypotheses should you test? Ho: H| $1,900 Ha: H $1,900 b. Suppose you select a = 0.10. Interpret this value in the words of the problem. The probablelity that the null hypothesis is when the average gain $1,900 is 0.10. c. For a = 0.10, specify the rejection region of a large-sample test. Choose the correct answer below. O A. z 1.645 OB. Z 2.575 OE. -2.575 1.645 OH. z> 1.28