Q2. Write a class with 2 methods. The first method determines if any two sides added together are greater than the remaining side. The second method calculates the triangle's area. // Method 1: Return true if the sum of every two sides is greater than the third. public static boolean isValid(double sid1, double side2, double side3) // Method 2: Return the triangle area public static double area(double side1, double side2, double side3) Develop a test program that takes in the three sides of a triangle and uses the isValid( )method to determine if the input is valid according to the above criteria. If the inputs are valid display the area. Otherwise display an error message and continue to ask for inputs until a valid set is received.

The weight of an object can be described by two integers: pounds and ounces (where 16 ounces equals one pound). Class model is as follows: public class Weight { private int pounds; private int ounces; public Weight(int p, int o) ( pounds=p+o/16: ounces = 0% 16: } Implement a method called subtract, which subtracts one weight to another. i.e. Weight w1 = new Weight(10.5): Weight w2 = new Weight(5.7): Weight w3= w1.subtract(w2):

Consider the following class definitions: public class Thing {public void string_method(String word) {word = word.substring(word.length() - 1);System.out.print(word);} }public class Thing2 extends Thing {public void string_method(String word) {super.string_method(word);System.out.print(word.substring(0,1));}} The following code segment appears in a class other than Thing or Thing2 Thing2 thing = new Thing2();thing.string_method("Tacky"); What is printed as a result of running the code segment? Group of answer choices yT yy Index Out of Bounds Error TT TackyTacky

2. A pentagonal number is defined as n(3n-1)/2 for n = 1, 2, ..., etc.. Therefore, the first few numbers are 1, 5, 12, 22, ... . Write a method with the following header that returns a pentagonal number: %3D public static int getPentagonalNumber(int n) For example, getPentagonalNumber(1) returns 1 and getPentagonalNumber(2) returns 5. Write a test program that uses this method to display the first 100 pentagonal numbers with 10 numbers on each line. Numbers are separated by exactly one space.