What a sad anticlimax to an otherwise really good specialisation!!!
Important data for this course, as well as vital links, no longer exist. The organisers have been made aware of this 2 years ago and no-one appears to have done anything. Unless the data is re-shared, it is probably best to make this course obsolete.
If you persevere like I did, and you use your own head and show some initiative, it is possible to complete 2 out of 3 assignments of this course , however don't expect your answers to match the "stock" answers. This makes grading yourself and other people farsical.