need help badly with this question, please show all work so i can understand and apply to a similar question. Thank you

Question 3. Part A. 17 randomly selected patients have chronic migraines. Each patient is given two pills. The first is a placebo (p), and the second is a drug (d) that scientists hope cures migraines. The length of time from the onset to the termination of the migraine is recorded using both regiments. The data follows. Build a 95% confidence interval for the difference in the termination times. Placebo Drug Differences (Placebo-Drug) IE__ Standard Deviation