Carly and Bill, both who have engineering and business backgrounds, have been working for the past year on developing a video doorbell and related home security video products. Their video doorbell is about to be introduced to the public. Before they do so, Carly and Bill need to determine how long of a warranty they want to include on this product. They are considering options of 1 year, 18 months or 2 years. What are some of the factors Carly and Bill should consider as they make this decision?