refactor to ensure that the questions ownershipsch instance variable and the value of ownershipsch on the log is the same in tests

spec/models/form/sales/questions/mortgageused_spec.rb

@@ -1,13 +1,15 @@
 require "rails_helper"
 
 RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
-  subject(:question) { described_class.new(question_id, question_definition, page, ownershipsch: 1) }
+  subject(:question) { described_class.new(question_id, question_definition, page, ownershipsch:) }
 
+  let(:ownershipsch) { 1 }
   let(:question_id) { nil }
   let(:question_definition) { nil }
   let(:form) { instance_double(Form, start_date: Time.zone.local(2024, 4, 1)) }
   let(:page) { instance_double(Form::Page, subsection: instance_double(Form::Subsection, form:)) }
-  let(:log) { build(:sales_log) }
+  let(:stairowned) { nil }
+  let(:log) { build(:sales_log, ownershipsch:, stairowned:) }
 
   it "has the correct answer_options" do
     expect(question.answer_options).to eq({
@@ -18,7 +20,7 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
   end
 
   context "when staircase owned percentage is 100%" do
-    let(:log) { build(:sales_log, stairowned: 100) }
+    let(:stairowned) { 100 }
 
     it "shows the don't know option" do
       expect(question.displayed_answer_options(log)).to eq({
@@ -30,7 +32,7 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
   end
 
   context "when an outright sale" do
-    subject(:question) { described_class.new(question_id, question_definition, page, ownershipsch: 3) }
+    let(:ownershipsch) { 3 }
 
     it "shows the don't know option" do
       expect(question.displayed_answer_options(log)).to eq({
@@ -42,7 +44,7 @@ RSpec.describe Form::Sales::Questions::Mortgageused, type: :model do
   end
 
   context "when staircase owned percentage is less than 100%" do
-    let(:log) { build(:sales_log, stairowned: 99) }
+    let(:stairowned) { 99 }
 
     it "shows the don't know option" do
       expect(question.displayed_answer_options(log)).to eq({