Please help me with this statistics question and all of the parts

A college volleyball coach was interested in whether the college's strength development class increased the amount of weight (measured in pounds) her players' could lift on the bench press exercise. She asked a random sample of volleyball players to participate in the study. The amount of weight they could lift was recorded before they took the strength development class. After completing the class, the amount of weight Ite they could lift was again measured. Ite The coach performed a hypothesis test Ho : UD = 0 versus HA : MD > 0 where up is the mean difference in players' maximum lift after and before (after - before) the strength development class Ite A matched pair t-test was conducted and the below code and qqnorm plot of differences (after - before) Iter were produced. Iten > t. test(after, before, mu=0, alternative="greater", paired=TRUE) Paired t-test Iter data: after and before t = 1.8386, df = 9, p-value = 0.04956 Item alternative hypothesis: true difference in means is greater than 0 95 percent confidence interval: Item 0. 08005225 Inf sample estimates : mean of the differences 26. 69982 Normal Q-Q Plot OS Sample Quanbles -1.5 -1.0 -0.5 0.0 0.5 10 Theoretical Quantiles a. How many volleyball players were included in the experiment? Please round your answer to the nearest integer. 834 O MAY . . . 8 *tv MacBook Pro * 0. Points possible: 2 MAY A 8 city MacBook Pro 4 * & LO