How do I create an excel sheet for this question:

The life of a Lapstrake Battery Co. battery for laptop computers is normally distributed with a mean of 1,800 days and standard deviation of 50 days. Using the Excel functions (see Chapter 6), determine the following:

a.What fraction of batteries is expected to survive beyond 1930 days?

b.What fraction will survive fewer than 1725 days?

c.Draw a chart of the reliability function using Excel.

d.What length of warranty is needed so that no more than 5 percent of the batteries will be expected to fail during the warranty period?