(a) How many points are gained by each alternative? What is the social preference? Now suppose alternatives c and d move to the top for all agents. The new individual preferences are: Individual 1 Individual 2 Individual 3 c d a b c d a b c d b a (b) How many points are gained by each alternative? What is the new social preference? (c) Use your answers to (a) and (b) to illustrate the concept of t