Based on a logistic regression of Depd on some covariates, we obtained the following prediction equation:

\[\begin{align*}\operatorname{logit}[\widehat{\operatorname{Pr}}(D e p d=1)] & =1.13-0.02 \text { Age }-1.52 M S D+0.29 R 1+0.06 R 2 \\& +0.90 M S D * R 1+1.79 M S D * R 2 \tag{4.50}\end{align*}\]

(a) Carefully interpret the effects. Explain the interaction by describing the race effect at each MS level and the MS effect for each race group.

(b) What is the predicted odds ratio of depression of a 50-year-old with MSD \(=0\) and Race \(=2\) versus a 35 -year-old with \(\mathrm{MSD}=1\) and Race \(=5\) ?