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7. Suppose you are given 3 attributes of mobile phones - Brand, Price and Coleur, 5 levels in brands, 4 levels in solour and 4 levels in price are considered. Given below is the output of dummy variable regression. (First level taken as reference in all attributes) (a part of the output is only shown) a. Uependent varape: Katng b. Predictors(constant) brand colour price From the given output: 7a. Find the percentage importance of brand, price and solour. 7b. Plot a part-worth diagram for the attribute - Brand. What is your observation