I am confused, please help :)

1. A manager of a campus store that sells posters conjectures that more than 30% of all freshman dorm rooms have a poster of a rock group. From n = 60 rooms selected at random. an investigator records X [the # of rooms having a poster of a rock group) is 25. Test whether the manager's conjecture is statistically correct under the 0.05 significance level. (Hint: 30% = 0.3. It is a "proportion".) (a) Check the three assumptions. (b) State the null and alternative hypotheses. (c) Calculate the test statistic 2*. (d) Compute the p-value. (e) Draw a conclusion regarding the null hypothesis and interpret the result based on the alternative hypothesis