Problem- (a) Use the emf series (Appendix D) to arrange the following species in order of decreasing strength as oxidizing agents: Br2, F2, Ag+ ?
(b) Use the emf series (Appendix D) to arrange the following species in order of increasing strength as oxidizing agents. Ca2+, Fe2+, Al3+ ?
So what I got...
For A is Br2 > F2 > Ag3+
For B is Fe2+ < Al3+ < Ca2+
Rework your solution from the beginning and check each step carefully.