Please include workings out

Question 4 Jane is testing the Null Hypothesis that the true mean of a population of small birds is p=15g against the alternative that u>15g. She obtains a sample mean of 17g, with a standard deviation of 6g, from a sample of 30 observations of small birds. a) Calculate the z score and the associated Prob-value for this test. Use the 5% significance level. (11 marks) b) A pharmaceutical company is testing a drug for Covid-19 on 30 volunteers. Sixteen of them said they were better. Does this evidence support the claim that the drug is effective in curing patients? (11 marks)