In an effort to analyze the effect of COVID 19 on health careexpenditure a research team in Healthystate considered 2019 to be the base year in calculating the Laspeyres Index. The following are data from 2018, 2019 and 2020   Quantity 2018 Prices 2018 Quantity 2019 Prices 2019 Quantity 2020 Prices 2020 Oxygen Supply 150 100 170 110 2500 180 Pharmaceutical Products 500 270 750 250 1500 210 Intensive Care 50 2170 50 2200 500 2300 Elective surgeries 150 1870 130 2100 5 3500 Considering the base year as year "0" a- calculate the Laspeyres index between 2018 and 2019 b- Calculate the Laspeyres index between 2019 and 2020 c- John claimed that since 2020 is an important year (since most of it was COVID 19 issues) we need to consider it as the base year. Calculate the Laspeyres index between 2019 and 2020.

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