Can you help me out with this one?

A sample of 29 paired observations generates the following data: d = 1.9 and s, = 3.8. Assume a normal distribution. (You may find it useful to reference the appropriate table: z table or t table) a. Construct the 90% confidence interval for the mean difference up. (Round intermediate calculations to at least 4 decimal places and final answers to 2 decimal places.) Confidence interval is to b. Using the confidence interval, test whether the mean difference differs from zero. O There is evidence that the mean difference differs from zero. O There is no evidence that the mean difference differs from zero