First Graders at an Elementary School Were Classified According to Whether

First graders at an elementary school were classified according to whether they werethe first born child in the family or not, and also whether both parents worked outsidethe home. This resulted in the accompanying table. Suppose that one of these students is selected at random. Define events A, B, and C as follows:
A = the event that the selected student is a first born
B = the event that the selected student's parents both work outside the home
C = the event that the selected student has older siblings

For each pair of events in the following table, indicate whether the two events are disjointand/or independent by putting a Y or N in the appropriate cells.