\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
30 randomly selected students were asked to state the number of siblings they have. The results of the survey are displayed in the graph.
  1. What sort of graph is being used?
  2. Which number of siblings is the most common?
  3. What percentage of the students have 2 siblings?
    \(\pourcent\)
  4. What percentage of the students have at least 1 sibling?
    \(\pourcent\)