fE^circ of some elements are, given: fI,+2 e^- 2 fI-, fE^circ=+0.54 fV endaligned`MnO_4^-+8 H^++5 e^r Mn^2++4 H_2 O, E_1^circ=+1,52 ~V` ``Fe^3++e^- Fe^2+, E^circ=+0.77 ~V ```Sn^4++2 e^- Sn^2 *, E^circ=+0.1 ~V` 'a) Select the strongest reductant and oxidant. in these. b) Select the weakest reductant and oxidant in these. c) Select the spontaneous reaction from the changes given below: i. `Sn^4+2 Fe^2 * Sn^2 *+2 Fe^h` ii. `2 Fe^2 *+I_2 .2 Fe^2++2 I^-` iii. `Sn^4++2 I_- Sn^2++I_2`