J.R. S. answered 10/19/20
Ph.D. University Professor with 10+ years Tutoring Experience
May be too later to meet your deadline, but maybe someone else can benefit from the answer.
Fe + Cd2+ ===> Fe2+ + Cd
0........2+.................2+.........0........oxidation numbers
Fe (iron) went from 0 to 2+, so it lost electrons meaning it was oxidized, and it is the reducing agent
Cd (cadmium) went from 2+ to 0, so it gained electrons meaning it was reduced, and it is the oxidizing agent