​For Five Years, Ryan Rob Has Lived on a Ranch

Essay

​For five years, Ryan Rob has lived on a ranch and grazed cattle on a neighboring land knowing the land belonged to another. Rob passes away during the sixth year and leaves all the property to his son, who continues with the ranch operation and the grazing. Fifteen years later, the son wishes to quiet title to the grazing land. The prescriptive period is 20 years. What result?