presentation: I think both presentations are good .but the link two presentation is more effective because there are many good things are there in it.one thing is  start of  presentation  the way he choose was energetic when he came and asked the questions to the people.he judge the knowledge of the people.the way of his presentation was funny. people were connect  with the presenter.tell story make a point  was a good way in whole presentation people were in touch whit him.           ON THE OTHER HAND  robeca presentation was bored .people were not intouch with her.she did not involve the people through questions .but she explained very well .she made head lines .whole to the presentation was to the point people can easily understand.