Answer
See explanation below.
Work Step by Step
This answer can be found in the chapter 24 reading.
a. Formation of 186Ir through electron capture
186 Pt 78 + 0 e-1 --> 186 Ir 77
b. Formation of francium-221 through alpha decay
225 Ac 89 --> 221 Fr 87 + 4 He 2
c. Formation of iodine-129 through b- decay
129 Te 52--> 129 I 53 + 0 b -1
