Answer
See explanation below.
Work Step by Step
This answer can be found in the chapter 24 reading.
a. Alpha decay of 234 92U
234 U 92 --> 4 He 2 + 230 Th 90
b. Electron capture by neptunium-232
232 Np 93 + 0 e-1 --> 232 U 92
c. Positron emission by 12 7N
12 N 7 --> 0 B1 + 12 C6