A hospital records the number of floral deliveries its patients receive each day. For a nine day period, the records show the following: 15, 27, 26, 24, 18, 21, 26, 19, 15 Use exponential smoothing with a smoothing constant of 0.4 to forecast the number of deliveries for day ten. O 22.99 O 21.40 O 18.84 17.96