Can you please provide answer for this with harvard refernces.

Advertisement in television (TV) is usually to inform and persuade viewers to buy your products and services. This means that the person appearing in the advertisement must have some credibility. Credibility comes from a person that one can trust or who has the credibility to endorse the product. In Australia it is usually well known Australian personalities who appear in the TV advertisement or likewise Vietnamese in Vietnam.

However in Japan, there seems to a huge number of foreigners appearing in Japanese TV commercial advertisement (examples are Arnold Schwarzenegger who appeared in TV ads endorsing a Japanese tonic drink called Arinamin, Bruce Willis appearing in Subaru and Maki jewellery, Brad Pitt in Edwin jeans, Charlize Theron in Honda TV ad , Catherine Zeta Jones for Lux or Pierce Brosnan for Visa card or David and Victoria Beckham for a Japanese cosmetic product called TBC and David Beckham appearing in Meij's chocolate called "Fran").

Questions

a) What seems to the main reasons that advertisers choose foreigners to appear in Japanese TV ad commercials rather than well known Japanese personalities? What are the risks and opportunities in using foreigners in appearing in Japanese TV commercials?

b) The successes of foreigners like Arnold Schwarzenegger or David Beckham appearance in Japanese T.V commercials does not translate into successes in advertisement in their own country. What seems to the reasons why they are not successful in their own country and yet so successful in Japan?

c) "The Western star that appears in Japanese TV ad uses his or her own face to make large sum of money in a short time by advertising/endorsing products there that they will probably never use." Discuss this statement in terms of its validity.