Add third question in pp exercise feedback

app/controllers/pair_programming_exercise_feedbacks_controller.rb

@@ -22,6 +22,16 @@ class PairProgrammingExerciseFeedbacksController < ApplicationController
      [4, t('pair_programming_exercise_feedback.estimated_time_more_30')]]
   end
 
+  def reasons_presets
+    [[0, t('pair_programming_exercise_feedback.reason_no_partner')],
+     [1, t('pair_programming_exercise_feedback.reason_to_difficult_to_find_partner')],
+     [2, t('pair_programming_exercise_feedback.reason_faster_alone')],
+     [3, t('pair_programming_exercise_feedback.reason_not_working_with_strangers')],
+     [4, t('pair_programming_exercise_feedback.reason_want_to_work_alone')],
+     [5, t('pair_programming_exercise_feedback.reason_accidentally_alone')],
+     [6, t('pair_programming_exercise_feedback.reason_other')]]
+  end
+
   def new
     exercise_id = if params[:pair_programming_exercise_feedback].nil?
                     params[:exercise_id]
@@ -64,6 +74,7 @@ class PairProgrammingExerciseFeedbacksController < ApplicationController
   def set_presets
     @texts = comment_presets.to_a
     @times = time_presets.to_a
+    @reasons = reasons_presets.to_a
   end
 
   def uef_params

app/views/pair_programming_exercise_feedbacks/_form.html.slim

@@ -18,6 +18,14 @@
         label.form-check-label
           = b.radio_button(class: 'form-check-input')
           = b.text
+    - if PairProgramming23Study.participate?(current_user, @exercise) && !current_contributor.programming_group?
+      h5.mt-4 = t('pair_programming_exercise_feedback.reason_work_alone')
+      = f.collection_radio_buttons :reason_work_alone, @reasons, :first, :last  do |b|
+        .form-check
+          label.form-check-label
+            = b.radio_button(class: 'form-check-input')
+            == b.text
+
     = f.hidden_field(:exercise_id, :value => @exercise.id)
     = f.hidden_field(:submission_id, :value => @submission.id)
   .actions = render('shared/submit_button', f: f, object: @uef)