An established Canadian bank wanted to get its employees’ opinions about an internal reorganization it had implemented in order to compete with new financial institutions (sometime called FinTech organizations) that operate entirely online. It wants to choose a representative sample of employees. It can select employees by age group, duration of employment with the bank, salary range, province of employment, or level within the bank’s managerial hierarchy. Give examples of how it should select employees for

a) a cluster sample and

b) a stratified sample, stating your reasons clearly. Marks will be given for reasons even if the answer is not what was intended.