Calculate the cost of a bundle with 100 units of good A, 200 units of good B, and 100units of good Z for 2017, 2018, and 2019 using the prices shown in the table 1.a. Then convert the results into an index for each year using 2017 as the base year.(Calculate total spending and price index for 2017, 2018 and 2019.) Calculate the percentage rate of change of the price level from 2018 to 2019 and from 2017 to 2018. Now suppose that the base year is 2019. Recalculate the price index for 2017, 2018, and 2019. Using the index with the 2019 base year, calculate the percentage rate of change of the price level from 2018 to 2019 and from 2017 to 2018.