I am having trouble with this question. The weight of a product is measured in pounds. A sample of 50 units is taken from a recent production. The...

The weight of a product is measured in pounds. A sample of 50 units is taken from a recent production. The sample yielded X¯¯¯ = 75 lb, and we know that σ2 = 100 lb. Calculate a 99 percent confidence interval for μ.

Can you help me with the steps?