Nuclear processes

Question

Considering the following two nuclear processes which produce isotopes useful for medical imaging.

i)                    Isotope A +¹ p           ----    ¹⁵ O + ¹ n

^{18 0}

ii)                   Isotope B + ¹ n          ----     Isotope C       ----       ⁹⁹ Mo + ¹³³Sn + 4  ¹ n

^{042 50               0}

Find the mass number and the atomic number for the unknown isotopes A B and C and identify them. Explain how you arrived at your answer.