Manybusinesses haveemployee wellness programs that encourage its employees to be active and have healthy behaviors. Southeast Missouri State University has a "fitness-tracker program," in which employees wear smartwatches and arepaid rewards forwalking a minimum of 10,000 steps aday.Usually,whenanalyzing these types of programs, researchers are most interested in learning aboutthe"extreme" users, meaning (1) thosewho walka lot of steps and (2) those who barely move throughout theday.Supposeresearchers wish to complete two separate multivariate analyses.One using a sample of heavy moversand another analysis using a sample of the leastmobile employees. What type of sampling method might be bestto use for this study? Explain your reasoning.