// return the average of all sales
 public double avgSales() {
   double total = 0.0;
   for (SalesPerson p : salesmen) {
     total += p.getSales();
   }
   return total / salesmen.length;
 }
  // display a report of the highest selling salesperson, the average sales and the above average
  // sales people
  public void displayReport() {

    SalesPerson highest = highestSales();
    System.out.println("The highest sales were from: " + highest.getName());

    System.out.println("The average sales were: " + avgSales());

    // print out a list of the sales people that were above average
    System.out.println("The following sales people were above average:");
    for (SalesPerson p : salesmen) {
      if (p.getSales() > avgSales()) {
        System.out.println(p.getName());
      }
    }
  }