Medians of a Triangle

This sketch allows you to examine the relationship between medians of a triangle. Simply grab any vertex and transform the triangle.
1) Can you determine whether these medians will always coincide? [br][br][br]2) Will they coincide inside the triangle?[br][br][br]3) What is the ratio of the parts of the median on teach side of the coincided meeting point?[br][br][br]4) How many Medians will there be in every triangle?

Information: Medians of a Triangle