Draw three overlapping circles to represent the variance and shared variance among X1, X2 and Y, and

Question:

Draw three overlapping circles to represent the variance and shared variance among X1, X2 and Y, and label each of the following: sr21, sr22, 1 – R2. What interpretation is given to the three way overlap? How do you deduce the area of the three way overlap from the information on your SPSS printout? (Can this area ever turn out to be negative, and if so, how does this come about?)