Dear Matthias, I really don't know how to thank you. You have not only sent a sample geogebra file for me to use on Moodle, but also you have obliged to help me further to design my worksheets. Unfortunately, I am not well and had to stop all my work. I am so impatient until I get well to test your sample file and continue my work.
Thank you so very much! I will get back to you ASA I am back to normal.