1. Read back through the article, Interaction of Oxytocin Leven and Past Depression May Predict Postpartum Depressive Symptom Severity (Massey et al, 2016), and answer the following questions. a. As outlined in the Introduction section, one of the research questions of this paper was to see if a history of major depressive disorder (MDD) interacted with third trimester plasma oxytocin levels on postpartum depression (PPD) severity. Parapln'ase what the authors were expecting to find in their results. (Ipt) b. To answer this question, the authors ran a multiple regression {see Table 2}. How well did their model fit the data? Cite the appropriate statistic. (lpt) c. Using the multiple regression results in Table 2, find the two slopes that are depicted in the interaction plot in Figure 3. You should be reporting the slope of third trimester plasma oxytocin on log-PPD for those with no past MDD and for those with a history of MDD. (2pt) d. Are the two slopes you found in part (c) significantly different from each other? How do you know? (lpt)