anchor.diff:                <td><%= question_set.questions.count %></td>
                 <td><%= question_set.order %></td>
                 <td><%= link_to 'Show', question_set %></td>
  +              <td><%= link_to 'New Question', new_question_set_question_path(question_set) %></td>
                 <td><%= link_to 'Edit', edit_question_set_path(question_set) %></td>
                 <td><%= link_to 'Destroy', question_set, method: :delete, data: { confirm: 'Are you sure?' } %></td>
               </tr>
  
positive.code: <div class="container">
    <h1><%= @activity.title %></h1>
    <p><%= @activity.article[0..280] + "..." %></p>
    <p><%= @activity.questions.count %></p>
    <p><%= link_to 'Play', play_activity_path(@activity) %></p>
    <p><%= link_to 'Edit', edit_activity_path(@activity) %></p>
    <p><%= link_to 'Destroy', @activity, method: :delete, data: { confirm: 'Are you sure?' } %></p>
  
    <h3>Question Sets</h3>
  
  
negative.code:         </tbody>
        </table>
      </div>
      <div class="card-footer">
      <%= link_to 'New Question Set', new_activity_question_set_path(@activity) %>
      </div>
    </div>
    
  
    <h3>Questions</h3>
  
    <div class="card">
      <div class="table-responsive">
        <table class="table table-hover table-outline table-vcenter card-table">
          <thead>
            <tr>
              <th>Question Set</th>
              <th>Prompt</th>
              <th colspan="3"></th>
            </tr>
          </thead>
  
          <tbody>
            <% @activity.questions.each do |question| %>
              <tr>
                <td><%= link_to question.question_set&.prompt, question_set_path(question.question_set_id) %></td>
                <td><%= question.prompt %></td>
                <td><%= link_to 'Show', question %></td>
                <td><%= link_to 'Edit', edit_question_path(question) %></td>
                <td><%= link_to 'Destroy', question, method: :delete, data: { confirm: 'Are you sure?' } %></td>
              </tr>
            <% end %>
          </tbody>
        </table>
      </div>
    </div>
  
    <%#  %>
  
  </div>