Exaplin how do i solve this.

a) B r_{2} \to B r^{-} O x i d a t i o n s t a t e o f B r i n B r_{2} = 0 o x i d a t i o n s t a t e o f B r i n B r^{-} = - 1 C h a n g e i n o x i d a t i o n s t a t e i s 1 B r_{2} + 2 e^{-} \to 2 B r^{-} T h u s t h e g a i n o f e l e c t r o n o c c u r a s w e l l a s t h e o x i d a t i o n s t a t e g e t s r e d u c e d . S o r e d u c t i o n o c c u r . b) F e^{2 +} \to F e^{3 +} o x i d a t i o n s t a t e o f F e i n F e^{2 +} i s + 2 a n d o x i d a t i o n s t a t e o f F e i n F e^{3 +} i s + 3 . T h e r e i s i n c r e a s e i n o x i d a t i o n s t a t e b y 1, s o o x i d a t i o n . O x i d a t i o n i s l o s s o f e l e c t r o n . F e^{2 +} \to F e^{3 +} + e^{-} c) M n {O_{4}}^{-} + H^{+} \to M n^{2 +} + H_{2} O o x i d a t i o n s t a t e o f M n {O_{4}}^{-} i s M n {O_{4}}^{-} x + 4 (- 2) = - 1 x = + 7 M n^{2 +} x = + 2 A s t h e o x i d a t i o n s t a t e c h a n g e d f r o m + 7 t o + 2, t h e r e i s r e d u c t i o n . M n {O_{4}}^{-} + 5 e^{-} + H^{+} \to M n^{2 +} + H_{2} O B a l a n c e t h o x y g e n a t o m M n {O_{4}}^{-} + 5 e^{-} + H^{+} \to M n^{2 +} + 4 H_{2} O B a l a n c e t h e h y d r o g e n a t o m M n {O_{4}}^{-} + 5 e^{-} + 8 H^{+} \to M n^{2 +} + 4 H_{2} O

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