3. Imagine that a friend wants to purchase some item about which you are knowledgeable (for example, a motorcycle, MP3 player, or sewing machine). The friend has asked your advice about which brand to buy. Design a matrix in which you list two or three brands and also at least six criteria you recommend that your friend use to compare them. Fill in the matrix as completely as you can. Each box you can't com- plete indicates an area you must research. Describe the methods you would use to gather the additional information. (See Chapter 5 for advice about using a matrix as a research tool.)