Add tutorial

AccessibilityDocumentation/AccessibilityDocumentation/Documentation.docc/AdjustableTutorial.tutorial

@@ -1,46 +1,36 @@
-@Tutorial(time: 2) {
+@Tutorial(time: 10) {
     @Intro(title: "Describe adjustable elements") {
         Simplifies interactions with a complex element for VoiceOver.
-
-        > Tip: 
-        > - Best for VoiceOver, is changed by vertical swipe
-        > - Avoid at Voice Control 
-        > - Replace by ``Book/accessibilityNavigationStyle`` for Switch Control 
     }
 
     @Section(title: "Basic setup") {
         @ContentAndMedia {
             By default any element can contains ``Book/accessibilityValue`` to expose additional data for user. Some elements come complicated and can contain dynamic value, controlled by vertical swipe. Examples:
-            - Slider
-            - Stepper
-            - Any horizontal carousel
-
-            > Note: After vertical swipe reads only the new value, a label is omitted to avoid repeatness. 
         }
 
         @Steps {
             @Step {
                 Accessible element can be marked by ``UIAccessibilityTraits_/adjustable`` trait to make ``Book/accessibilityValue`` dynamic. 
 
-                @Code(name: "", file: "AdjustableTutorialStep1")
+                @Code(name: "", file: "AdjustableTutorialStep_1")
             }
 
             @Step {
                 Accessible element can be marked by ``UIAccessibilityTraits_/adjustable`` trait to make ``Book/accessibilityValue`` dynamic. 
 
-                @Code(name: "", file: "AdjustableTutorialStep2")
+                @Code(name: "", file: "AdjustableTutorialStep_2")
             }
 
             @Step {`
                 As a result the element will react on vertical swipe by calling ``Book/accessibilityIncrement()`` and ``Book/accessibilityDecrement()``. 
 
-                @Code(name: "", file: "AdjustableTutorialStep3")
+                @Code(name: "", file: "AdjustableTutorialStep_3")
             }
 
             @Step {
                 After each swipe the ``Book/accessibilityValue`` getter will be reread and the new value will be spoken out.
 
-                @Code(name: "", file: "AdjustableTutorialStep3")
+                @Code(name: "", file: "AdjustableTutorialStep_3")
             }
         }
     }
@@ -56,13 +46,47 @@
 
                 Distinguish behaviour in code by dynamic getter:
 
-                @Code(name: "", file: "AdjustableTutorialStep4")
+                @Code(name: "", file: "AdjustableTutorialStep_4")
             }
 
             @Step {
                 Switch Control requires grouping
 
-                @Code(name: "", file: "AdjustableTutorialStep5")
+                @Code(name: "", file: "AdjustableTutorialStep_5")
+            }
+        }
+    }
+
+    @Assessments {
+        @MultipleChoice {
+            What assistive technologies uses adjustable trait
+
+            @Choice(isCorrect: false) {
+                Switch Control
+
+
+                @Justification(reaction: "Try again!") {
+                    Switch Controls requires grouping, to simplify navigation, but uses ``Book/accessibilityNavigationStyle`` for that.
+                }
+            }
+
+
+            @Choice(isCorrect: true) {
+                VoiceOver
+
+
+                @Justification(reaction: "That's right!") {
+                    Blind person would like to reduce number of elements on screen and simplify interactions by vertical swipe to adjust the value of the element
+                }
+            }
+
+            @Choice(isCorrect: false) {
+                Voice Control
+
+
+                @Justification(reaction: "Try again!") {
+                    Voice Control uses person who can see and they prefer to see elements as separate buttons
+                }
             }
         }
     }