`E^(c-)` of some elements are given as `:`
`{:(I_(2)+2e^(-)rarr 2I^(c-),,,,E^(c-)=0.54V),(MnO_(4)^(c-)+8H^(o+)+5e^(-)rarr Mn^(2+)+4H_(2)O,,,,E^(c-)=1.52V),(Fe^(3+)+e^(-)rarr Fe^(2+),,,,E^(c-)=0.77V),(Sn^(4+)+2e^(-)rarr Sn^(2+),,,,E^(c-)=0.1V):}`
`a.` Select the stronges reductant and weakes oxidant among these elements.
`b.` Select the weakest reductant and strongest oxidant among these elements.

Explanation

More or +ve is `E_(RP)^0`, more is the tendency for reduction or stronger is oxidant. Therefore, since maximum `E_(RP)^0` stands for :
`MnO_4^- +8H^+ +5e to Mn^(2+)+4H_2O,E_(RP)^0=+1.52V`
`:.` strongest oxidant : `MnO_4^-`, and conjugate reductant and vice-versa