Given the query: "What are the total purchases of TV in each consumer-city from suppliers in Chicago?" Which of the following OLAP operations need to be applied in order to solve the query when applied to the (supplier-city, consumer-city, product) cuboid? choose one option___ a) Reduction of dimension product b) Hierarchy climbing on the supplier dimension c) Dice by product name is TV and supplier city is Chicago d) Hierarchy climbing on the consumer dimension e) Reduction of dimension supplier f) Slice by supplier city g)Reduction of dimension consumer