Anita Limited has shared their annual sales revenue over the last 6 financial years from 2015 to 2020.

Year	Sales ($ 000)
2015	4500
2016	5100
2017	4900
2018	5400
2019	5670
2020	6000

You are required to;

1. Using linear trend equation forecast the sales revenue of Anita Limited for 2021. (5 marks

b.Calculate the forecasted sales difference if you use 3-period weighted moving average designed with the following weights: 2018 (0.1), 2019 (0.3) and 2020(0.6).