You need to create an Android application prototype which lock screen and show a "question" from the list (kind of CAPTCHA) if "answer" is correct screen is unlocked for 15 min. Design could be very simple and should have a screen with 3 elements: a label to show question, text filed to input answer and a the "Unlock" button. Question-Answer pairs should be stored in the JSON file.
Acceptance criteria:
1) Run application -> application screen is visible and user can not close/hide it
2) If user click button and answer is correct -> screen unlocked
3) if screen unlocked 15 min -> application screen is visible and user can not close/hide it
4) Provided code and instructions allow to debug and build apk in Android Studio

Expected artifacts:
1) source code
2) instruction to build apk
3) basic documentation
4) demo call to review code and discuses cost of MVP.