1) Draw a complete multidimensional schema to analyze the Purchase business activity. Use the following analytical queries to identify the components of the diagram to draw (measures, dimensions, parameters, weak attributes, and hierarchies): . . Total amount of purchased products by supplier monthly or quarterly, or by semester Yearly purchased quantity from each supplier (id and name) Total quantity purchased by city of supplier (6 marks). Average amount of Purchase Orders by country of supplier Total amount of purchase by category of products. 2) For each measure of the fact in your previous diagram, say whether it is Additive, Semi-additive or Non- Additive (1 mark) 3) Among the dimensions of the fact in your previous diagram which dimension(s) could be considered as Slowly Changing Dimension. (1 mark) (2 marks) 4) Briefly and clearly explain a method the Data Warehouse Management System uses to manage a Slowly Changing Dimension