A convex 4-vertex polygon is divided into four triangles, as shown in Figure 8.9.Write a program that prompts the user to enter the coordinates of four vertices and displays the areas of the four triangles in increasing order. Here is a sample run:

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Enter x1, y1, х2, у2, х3, у3, х4, у4: JEnter -2.5 2 4 4 3 -2 -2 -3.5 The areas are 6.17 7.96 8.08 10.42 V2 (x2, y2) V1 (x1, y1) Vз (х3, у3) V4 (x4, y4)