Amazon IMDB coding test

FileName: Company.java
import java.util.ArrayList;
import java.util.List;

public class Company {

    // IMPORTANT: DO NOT MODIFY THIS CLASS
    public static class Employee {

        private final int id;
        private final String name;
        private List<Employee> reports;

        public Employee(int id, String name) {
            this.id = id;
            this.name = name;
            this.reports = new ArrayList<Employee>();
        }

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }

        public List<Employee> getReports() {
            return reports;
        }

        public void addReport(Employee employee) {
            reports.add(employee);
        }
    }

    /*
     * Read the attached PDF for more explanation about the problem
     * Note: Don't modify the signature of this function
     * @param ceo
     *
     * @param firstEmployee
     *
     * @param secondEmployee
     *
     * @return common manager for both employees that is closest to them.
     */
    @SuppressWarnings("unused")
    public static Employee closestCommonManager(Employee ceo, Employee firstEmployee, Employee secondEmployee) {
       // Implement me
        return null;
    }
};