better quiz access

app/models/candidate.rb

@@ -18,6 +18,14 @@ class Candidate < ApplicationRecord
     answers.where.not(answer: nil)
   end
 
+  def fetch_question qid
+    CandidateQuiz.new(id).fetch_question(qid).first
+  end
+
+  def my_quiz
+    CandidateQuiz.new(id).build_my_quiz
+  end
+
   private
 
     def generate_test_hash