///////////////////////////////////////////////////////////////////////////////////// // File: mail.java class Letter { int weight; int rate; int fees; Letter (int weight, int rate, int fees) { this.weight = weight; this.rate = rate; this.fees = fees; } } // Letter let1 = new Letter(2, 20, 120); // Letter let2 = new Letter(3, 20, 0); // "Testing the methods in the Letter class" class Ad { int weight; int rate; Ad (int weight, int rate) { this.weight = weight; this.rate = rate; } } // Ad ad1 = new Ad(2, 10); // Ad ad2 = new Ad(8, 20); // "Testing the methods in the Ad class"