What is the gamma-ray absorbed dose rate (Gy/h) in an infinite air medium at a distance of 10 cm…

What is the
gamma-ray absorbed dose rate (Gy/h) in an infinite air medium at a distance of
10 cm from a 1-mCi point source of (a) 13N and (b) 43K? Energies and
frequencies of the emitted gamma rays from these radio nuclides are given in
Appendix D.