title: Find the name and age of the oldest person in a txt file using ruby
body: <p>"Attached is a file with people's names and ages.
  There will always be a First name and Last name followed by a colon then the age.
  So each line with look something like this.
  FirstName LastName: Age</p>
  
  <p>Your job is write a ruby program that can read this file and figure out who the oldest person/people are on this list.  Your program should print out their name(s) and age(s)."</p>
  
  <p>This is the code I have so far:</p>
  
  <pre><code>File.open('nameage.txt') do |f|
    f.each_line do |line|
      line.split(":").last.to_i
      puts line.split(":").last.to_i
    end
  end
  </code></pre>
  
  <p>With this, I am able to separate the name from the age but I don't know how to get the highest value and print out the highest value with name and age.
  Please help!</p>