using Ruby do little changes to run the program : for every line of code a description is given what to do i have completed half of the program and stuck in self object and onwards program so please complete it so that it works.
    
   

 class Person
      #have a first_name and last_name attribute with public accessors
      #attr_accessor 
      
      attr_accessor :first_name , :last_name
      
      #have a class attribute called `people` that holds an array of objects
      
      @@people = []
    
      #have an `initialize` method to initialize each instance
      def initialize(first_name,last_name)#should take 2 parameters for first_name and last_name
        @first_name = first_name
        @last_name = last_name      #assign those parameters to instance variables
           #add the created instance (self) to people class variable
      end
    
      #have a `search` method to locate all people with a matching `last_name`
      def self.search(last_name)
        #accept a `last_name` parameter
        #search the `people` class attribute for instances with the same `last_name`
        #return a collection of matching instances
      end
    
      #have a `to_s` method to return a formatted string of the person's name
      def to_s
        #return a formatted string as `first_name(space)last_name`
      end
    end
    
    p1 = Person.new("John", "Smith")
    p2 = Person.new("John", "Doe")
    p3 = Person.new("Jane", "Smith")
    p4 = Person.new("Cool", "Dude")
    
    puts Person.search("Smith")
    
    # Should print out
    # => John Smith
    # => Jane Smith

