19. Data transformation includes which of the following? * (1 Point) A process to change data from a detailed level to a summary level O A process to change data from a summary level to a detailed level O Joining data from one source into various sources of data O Separating data from one source into various sources of data All of the above None of the above 20. Granularity refers to * (1 Point) The level of detail of the data stored in a data warehouse The number of fact tables in a data warehouse The number of dimensions in a data warehouse The level of detail of the data descriptions held in a data warehouse All of the above None of the above