One way in which marketers aim to change attitudes toward their brands is through changing the basic motivational function of attitudes: utilitarian; ego-defensive; value-expressive; knowledge. List and discuss what two of these functions mean and how attitude is changed in each case. In your discussion of each function, provide an example of an ad that you have seen, or provide a link to an ad on a video-sharing site such as YouTube, that attempts to change attitudes in the way you have discussed.