Optus, the second largest telecommunications company in Australia, is considering signing up Usain Bolt, the world's fastest athlete, to be the face of their new advertising campaign. a) Use the concepts of schema and associative network to explain this may (or may not) be a good choice. b) Optus is also considering signing up Jamie Oliver, the celebrity chef, as a spokesperson for their advertising campaign. Use the match-up hypothesis to explain why this may (or may not) be a good choice c) Discuss three (3) tactics that Optus could use to increase exposure to its new advertisements