I would like some assistance with the following 1 sample proportion hypothesis testing questions

I would like some detailed explanation

A. A manufacturer of sprinkler systems used for fire protection in office buildings claims that the true average system-activation temperature is 130 degrees. A sample of 9 systems when tested yields a sample average activation temperature of 131.08 degrees. If the distribution of activation times is normal with a standard deviation of 1.5 degrees, test at the 1% level of significance to see if the data shows evidence which is different from the manufacturers claim. (a) State the null and alternative hypotheses to be tested. (2 marks) Ho: (b) What is the test statistic? (1 mark)(d) Evaluate the test statistic