will anyone please help me with this problem?? :(

Assume that the paired data came from a population that is normally distributed. Construct a 95% confidence interval for the mean of all differences x – y

x_i 11 13 17 8 6 9 15 9

y_i 6.0 10.0 14.0 5.0 11.0 7.0 14.0 13.0

Find the 95% confidence interval

______ < ų_d < ________ (round to nearest decimal place as needed)