M121 CHAPTER-3 Lab-1-Db and Collection used

Hi everyone, i am not sure if anyone is still checking through these
threads as most of the messages posted here appear to be from 2019, but here it goes.
Can someone verify which db and collection should be used for M121 CHAPTER-3 Lab-1 titled :" $group and Accumulators"? And since you are at it can someone post the overall number of documents that
is seeing in that particular collection?

Thanks in advance

Perhaps threads related to this particular lab are from 2019, but there are other threads in this course from a few hours ago.