static void Main()
{
// Create arrays of different kinds of animals and calculate the average age of each kind of animal using a static method (you may use LINQ).
List <Animal> animals = new List <Animal>();
animals.Add(new Cat("Garfield", 5, Gender.Male));
animals.Add(new Dog("Scooby Doo", 8, Gender.Male));
animals.Add(new Frog("Mr. Toad", 2, Gender.Female));
animals.Add(new Kitten("IWatchYouSleepAtNight", 3));
animals.Add(new Tomcat("Tom", 5));
animals.Add(new Cat("Pisana", 8, Gender.Female));
animals.Add(new Dog("Mark", 4, Gender.Male));
animals.Add(new Frog("Froggy", 2, Gender.Male));
animals.Add(new Kitten("HoomanSlaya", 0));
animals.Add(new Tomcat("PussInBoots", 3));
animals.Add(new Cat("Pesho", 3, Gender.Male));
animals.Add(new Dog("Sharo", 5, Gender.Male));
animals.Add(new Frog("Kwak", 9, Gender.Female));
animals.Add(new Kitten("DreamCrusher", 10));
animals.Add(new Tomcat("Kotio", 9));
var dogs = animals.Where(d => d is Dog);
var frogs = animals.Where(f => f is Frog);
var cats = animals.Where(c => c is Cat);
var tomcats = animals.Where(t => t is Tomcat);
var kittens = animals.Where(k => k is Kitten);
Console.WriteLine($"Dogs' average age is: {Dog.CalculateAverageAge(dogs)}");
Console.WriteLine($"Frogs' average age is: {Frog.CalculateAverageAge(frogs)}");
Console.WriteLine($"Cats' average age is: {Cat.CalculateAverageAge(cats)}");
Console.WriteLine($"Tomcats' average age is: {Tomcat.CalculateAverageAge(tomcats)}");
Console.WriteLine($"Kittens' average age is: {Kitten.CalculateAverageAge(kittens)}");
}
