Which of the following statements must be correct, which might possibly be correct, and which cannot

Which of the following statements must be correct, which might possibly be correct, and which cannot be correct? (i) The nucleus 89Y (atomic number = 39) has a ground state spin I = 1/2. (ii) The nucleus 90Zr (atomic number = 40) has a ground state spin I = 1. (iii) The nucleus 91Zr (atomic number = 40) has a ground state spin I = 1/2. (iv) The nucleus 92Mo (atomic number = 42) has a ground state spin I = 0. (v) The nucleus 138La (atomic number = 57) has a ground state spin I = 0