$1.$ Give concise answers to the following questions $/10$

a$)$ What is Encapsulation?

$/5$

b$)$ What are the differences between a class and an abstract class?

$/5$

$2.$ Design different classes in an inheritance hierarchy$/$relationship to represent different shapes $($circle$,$ square, triangle, rectangle, rhombus, and pentagon$).$ All the shape classes should inherit from a common base class. The classes should contain functions to calculate the shape$$s area. Include any other relevant members you think may be needed. $($Note that, in this task, you do not need to implement any method, only a class design diagram $($or UML$)$ with member fields, properties, and method signatures can satisfy this question.$)$

$/10$

$$

$3.$ What is the exact output of the program below?

public class Base

$\{$

public Base$()$

$\{$

Console.WriteLine$("$Base Constructor"$)$;

$\}$

public virtual void Func$()$

$\{$

Console.WriteLine$("$Base Func"$)$;

$\}$

$\}$

public class Derived : Base

$\{$

public Derived$()$

$\{$

Console.WriteLine$("$Derived Constructor"$)$;

$\}$

public override void Func$()$

$\{$

Console.WriteLine$("$Derived Func"$)$;

$\}$

$\}$

class Program

$\{$

static void Main$($string$[]$ args$)$

$\{$

var b $=$ new Base$()$;

b$.$Func$()$;

var d $=$ new Derived$()$;

d$.$Func$()$;

$\}$

$\}$

$/10$