Use the value of s2 found in Exercise 11.21(a) to

Use the value of s2 found in Exercise 11.21(a) to compute:
(a) A 99% confidence interval for the average amount of chemical that will dissolve in 100 grams of water at 50° C;
(b) A 99% prediction interval for the amount of chemical that will dissolve in 100 grams of water at 50°C.