Using Figure 9.1 and 9.2 as guides, name four internal and four external databases that you think should be included in a data warehouse for marketing function of Procter and Gamble or the consumer packaged goods company with whom you are most familiar. Procter and Gamble has products like Gillette razors, Tide detergent and Pampers diapers. Why are these eight databases you recommend critical to the effective functioning of the marketing department to sell more products? Support your answer.