Add top_guidance_partial to missed shared ownership questions

app/models/form/sales/questions/mortgageused.rb

@@ -8,7 +8,7 @@ class Form::Sales::Questions::Mortgageused < ::Form::Question
     @answer_options = ANSWER_OPTIONS
     @ownershipsch = ownershipsch
     @question_number = QUESTION_NUMBER_FROM_YEAR_AND_OWNERSHIP.fetch(form.start_date.year, QUESTION_NUMBER_FROM_YEAR_AND_OWNERSHIP.max_by { |k, _v| k }.last)[ownershipsch]
-    @top_guidance_partial = "financial_calculations_discounted_ownership" if @ownershipsch == 2
+    @top_guidance_partial = top_guidance_partial
   end
 
   def displayed_answer_options(log, _user = nil)
@@ -35,4 +35,9 @@ class Form::Sales::Questions::Mortgageused < ::Form::Question
     2023 => { 1 => 90, 2 => 103, 3 => 111 },
     2024 => { 1 => 91, 2 => 104, 3 => 112 },
   }.freeze
+
+  def top_guidance_partial
+    return "financial_calculations_shared_ownership" if @ownershipsch == 1
+    return "financial_calculations_discounted_ownership" if @ownershipsch == 2
+  end
 end

app/models/form/sales/questions/staircase_bought.rb

@@ -11,6 +11,7 @@ class Form::Sales::Questions::StaircaseBought < ::Form::Question
     @step = 1
     @suffix = "%"
     @question_number = QUESTION_NUMBER_FROM_YEAR[form.start_date.year] || QUESTION_NUMBER_FROM_YEAR[QUESTION_NUMBER_FROM_YEAR.keys.max]
+    @top_guidance_partial = "financial_calculations_shared_ownership"
   end
 
   QUESTION_NUMBER_FROM_YEAR = { 2023 => 77, 2024 => 79 }.freeze