Answer
See the answer below.
Work Step by Step
From the figure 8-10 data:
a) N, because it's more electronegative (3.0 vs 2.5)
b) C, because it's more electronegative (2.5 vs 2.2)
c) Br, because it's more electronegative (3.0 vs 2.5)
d) O, because it's more electronegative (3.5 vs 2.6)