Starting With ${ } _ { 92 } ^ { 235 } \mathrm { U }$

Short Answer

Starting with ${ } _ { 92 } ^ { 235 } \mathrm { U }$ , assume that the following three decays occur in sequence:
(1) alpha decay
(2) beta-minus decay
(3) alpha decay
Determine the correct isotope that is left after each decay.