Answer
a) $^{30}_{15}P+^{0}_{-1}e$ -> $^{30}_{14}Si$
b) $^{13}_{6}C+^{1}_{0}n$ -> $^{14}_{6}C$
c) $^{131}_{53}I$->$^{131}_{54}Xe + ^{0}_{-1}e$
Work Step by Step
a) $^{30}_{15}P+^{0}_{-1}e$ -> $^{30}_{14}Si$
b) $^{13}_{6}C+^{1}_{0}n$ -> $^{14}_{6}C$
c) $^{131}_{53}I$->$^{131}_{54}Xe + ^{0}_{-1}e$