/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: KhaikalRifqi https://cdn.slidesharecdn.com/profile-photo-KhaikalRifqi-48x48.jpg?cb=1523742361 El Classico Excellent Class of Science Two twitter : khaikal_rf Skypeâ„¢ : ical.rf Y!M : asek.asek 231d5044