Answer
See explanation below.
Work Step by Step
a. For 61 Fe 26, which undergoes beta decay, N/Z ratio is 1.3
b. For 41 Cl 17, which undergoes beta decay, N/Z ratio is 1.4
c. For 110 Ru 44, which undergoes beta decay, N/Z ratio is 1.5
This answer can be found in the chapter 24 reading.