provide data for infographic

[vecna]

In reference to the work in progress https://eu19.tracking.exposed/page/facebook-answer/ @lc-d

graph 1

• three users, one donut char each (pick the three)
• todo: number of impression by typology (c3 provide percentage alone)

graph 2

• selecting the 4 journal
• provide the number of all the journals produced posts
• provide the amount of view post for individual user

graph 3

• selecting all the sources and count all the published posts, derive an average per day
• select all the view posts, derive an average per user, per day, of unique posts seen
• find all the postId available never display once.