Which one is the population and which one is the sample

A local gym owner is interested in learning how much weight was lost, on average, by participants in her Zumba class over a period of three months. During that time, there were 60 people enrolled in the class. She uses a random number generator to obtain a list of 10 of those people whom she calls and asks about their weight loss. In this study, the 60 people enrolled in the class were the [ Select ] V and the 10 who were called were the [ Select ] V