Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.

(i) Vanadate (VO₃^-)-Oxidation state of V is + 5.

(ii) Chromate (CrO₄ ^2-)-Oxidation state of Cr is + 6.

(iii) Permanganate (MnO₄ ^-) Oxidation state of Mn is + 7.