Answer:
1.shows the number of protesters... The function is that it shows what the magnitude of disagreement with what is being protested
2. shows education of participants... The function is that it shows how much were the actions of the protesters
3. the number of signatures collected for a different decision... The function is that it shows the total number of dissenters
4.shows the number of victims in the period of protest... The function is that it shows the opposing side of the protest not from the best point of view