Use a t-distribution to find a confidence interval for the difference in means μd=μ1−μ2 using the relevant sample result

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Use a t-distribution to find a confidence interval for the
difference in means μd=μ1−μ2 using the relevant sample results from
paired data. Assume the results come from random samples from
populations that are approximately normally distributed, and that
differences are computed using d=x1−x2. A 90% confidence interval
for μd using the paired difference sample results x⎯⎯d=557.1,
sd=148.8, nd=100. Give the best estimate for μd, the margin of
error, and the confidence interval. Enter the exact answer for the
best estimate, and round your answers for the margin of error and
the confidence interval to two decimal places.