Programming diagram for Programming Challenge 3 Challenges 439 Figure 6-27 RoomCarpet - size RoomDimension - carpetCost: double +RoomCarpet (dim RoomDimension. cost: double) + getTotalCost) double + toString) String RoomDimension - 1ength double - width double + RoomDimension (len double, w double) + getArea() double + toString() String 4. LandTract Class Make a LandTract class that has two fields: one for the tract's length, and one for the width. The class should have a method that returns the tract's area, as well as an equals method and a toString method. Demonstrate the class in a program that asks the user to enter the dimensions for two tracts of land. The program should display the area of each tract of land and indicate whether the tracts are of equal size