In a case of a company, some data are known: Product Revenue in 2018, Prices in 2019 Produced quantitites million EUR (2018=100,0%) 2019 (2018-100,0%) 100 100 200 98 110 A 102 B a) Calculate the total relative change of revenues (value index). (5 points) b) Calculate the effects behind the total relative change of revenues. (5 points) c) Create a coherent interpretation about the calculated results. (5 points)