A small lawn mower company produced 1,500 lawn mowers during the year. In an effort to determine how maintenance-free these units were, the company decided to conduct a multi-year study of these particular lawn mowers. A sample of 200 owners of these lawn mowers was drawn randomly from company records and contacted. The owners were given a toll-free number and asked to call the company when the first major repair was required for the lawn mowers. Owners who no longer used the lawn mower to cut their grass were disqualified. After many years, 187 of the owners had reported. The other 13 disqualified themselves. The average number of years until the first major repair was 5.3 for the 187 owners reporting. It is believed that the population standard deviation was 1.28 years. If the company wants to advertise an average number of years of repair-free lawn mowing for this lawn mower, what is the point estimate? Construct a 95% confidence interval for the average number of years until the first major repair.