The following data represent the annual revenue (in millions of dollars) for a cloud software company from 2009 to 2020.

Complete the table by developing:

• 4-year moving average forecasts
• 3-year weighted moving average forecasts using weights 6, 5 and 2,with emphasis placed on more recent periods
• exponentially smoothed forecasts with ?=?=0.15

Exponential 4-year 3-year Weighted Year Revenue Moving Average Moving Average Smoothing (a = 0.15) 2009 5.2 2010 5.9 2011 4.7 2012 5.4 2013 6.4 2014 5.7 2015 6.3 2016 4.7 2017 5.0 2018 5.2 2019 6.0 2020 5.2 2021