Answer
See explanation below.
Work Step by Step
This answer can be found in the chapter 24 reading.
a. Formation of 48 22Ti through positron emission
48 V23 --> 48 Ti22 + 0 B 1
b. Formation of silver-107 through electron capture
107 Cd48 + 0 e -1 --> 107 Ag 47
c. Formation of polonium-206 through a decay
210 Rn86 --> 206 Po 84 + 4 He 2