A hospital records the number of floral deliveries its patients receive each day. For a two-week period, the records show the following number of deliveries:
15, 27, 26, 24, 18, 21, 26, 19, 15, 28, 25, 26, 17, 23
Use the exponential smoothing model with a smoothing constant of 0.4 to forecast the number of deliveries for the next day.