the argumentg between apple and David Einhorn from Green capital

the argumentg between apple and David Einhorn from Green capital 1) iPrefs to current shareholders would affect Apple’s enterprise value?the only impact is cariance $1.9 bil. isn’t it?2) iPrefs to current shareholders would change Apple’ cost of capital? If it did change; was there a way to predict what it would be?3) Alternatives for Apple to return cash to current shareholders? What would you recommend?