Thank you very much for your reply. I really appreciate your feedback. Honestly speaking the statistic results of the survey shows 17 minutes as an average time. So yeah the survey will take that amount of time.Well for your reference, we conducted a survey like this in 2016. You can go through the survey result and look forward to your feedback.
https://www.tu-braunschweig.de/Medie...16_english.pdf


:-)