write 1600 words about the positioning of three mid-class luxurious sedans include Audi A6, Benz E class and BMW 5 series in chinses market. The request is following : Define positioning. Discuss the positioning approaches used by each product (undifferentiated/mass market, differentiated or mixed use). What positioning statements do each of the products use, if any? Are the positioning statements an apt reflection of the product? Describe in detail the target market, market segmentation, and market targeting for each of the products. Consider the inclusion of a perceptual map that plots the perceived position of each product in the marketplace. Is it where the organizations would like to have their products? write with reliable references and may need diagram，chart and data.