During a 2 week period, Murielle took her umbrella with her on 8 days. It rained on 9 days, and Murielle took her umbrella on five of the days when it rained.
a. Display this information on a Venn diagram.
b. Hence find the number of days that:
Murielle did not take her umbrella and it rained
c. Murielle did not take her umbrella and it did not rain.