2. Simple Calculator V 2.0 Modify your Calculator program from the Selections Lesson, so that it incorporates the following methods: 1- public static int addition (int a, int b) Performs any addition...

I need the solution for these 3 questions in java, please.

Extracted text: 2. Simple Calculator V 2.0 Modify your Calculator program from the Selections Lesson, so that it incorporates the following methods: 1- public static int addition (int a, int b) Performs any addition operations. 2- public static int subtraction (int a, int b) Performs any subtraction operations. 3- public static int multiplication (int a, int b) Performs any multiplication operations. 4- public static int division (int a, int b) Performs any division operations. 5- public static int modulus (int a, int b) Performs any modulus operations. 6- public static int inputNumber ( ) Inputs the numbers from the user. 7- public static String inputSign() Inputs the operation from the user. 8- public static void output (int a, char op, int b, int answer) Displays the final calculation to the screen. 3. High Low Create a program that gets three numbers from a user. Write two methods: one called largest which returns the value of the largest of its three double parameters, and one called smallest which returns the value of the smallest of its three double parameters. The program should then display both values with an appropriate message.


Extracted text: 5. Data Validation Create the following methods that can be used to gather correct data from the user: public static int readValidInt (int low, int high) Returns an integer value that is within the stated range. public static double readValidIDouble (double low, double high) Returns a double value that is within the stated range.