Answer all questions with explanation

6.1 Inspect the time series plot below and identify and explain the underlying time-series components. (2 Marks) Sales ($ millions) 70.00 60.00 50.00 40.00 30.00 20.00 10.00 0.00 H N m HN m + N m + HNm + Quarter Year 2015 2016 2017 2018 2019 2021 AAV B Ib. A time-series graph is produced for the above table and a linear equation is generated as below. Profit in $m 40 30 Profits $m 20 y = 2.9697t + 6.2667 10 R2 = 0.8081 0 1 2 3 4 Time periods Profit . Linear (Profit) Using the equation, forecast the profit in $ millions for periods 15 and 20. (2 Marks)