How to Calculate Values Between Ages in mvc5 code first

Hello guys, I want to Collect values between ages like this table and i am using mvc5 code first how can i display count values between the ages from my model

age from 1 to 10	age from 10 to 20	age from 20 to 30	age from 30 to 40
?	?	?	?

The ages i entered by a textbox how can i Sort and collect them

and this is my model

public class Pation
{
[Key]
public int Id { get; set; }
public string PationName { get; set; }
public int Age { get; set; }
public Sex Sex { get; set; }
public Viset viset { get; set; }
public Free IsFree { get; set; }
public string NameProd { get; set; }
public string esalNum { get; set; }
public string Pationphone { get; set; }
public string cons { get; set; }
public DateTime DateWared { get; set; } = DateTime.UtcNow.AddHours(3);
}