1. Tammy contracted with Kristin to manufacture, sale, and deliver to Kristin and put in running order a certain machine. Once Tammy had set up The machine and put it in running order, however, Kristin found it unsatisfactory and notify tell me that she rejected the machine she continue to use it for three months but continually complain of it's defective condition at the end of the three months she notified Tammy to come and get it. Has Kristin lost her right to reject the machine? Or to revoke acceptance of the machine?