Write an Android phone program such that three rows of widgets will be displayed on the AVD. The first row has two instances of Button with texts Union and Intersection, respectively. The second row has two instances of Button with texts Degree and Tree, respectively. The third row has an instance of TextView with text Definition appears here. When the users of the program click the button instances, the corresponding definitions of those four concepts in AMTH 174 will appear in the instance of TextView. Hints: the union of two sets A and B is a set containing the elements in either A or B. The intersection of two sets A and B is a set containing the elements in both A and B. The degree of a vertex v in a graph is number of vertices which are adjacent to v. A tree is a connected graph which does not have a cycle. Notice that I named this program as Dis Math Learning System. If you are interested in refining or expanding this program, we can work together.