Lines AB and CD intersect at point O. A ray OE is drawn inside ∠AOC such that ∠AOE=35∘. Another ray OF is drawn inside the vertically opposite angle ∠BOD such that ∠DOF=25∘.
a. (i) Calculate ∠BOE.
b. (ii) Calculate ∠COD.
c. (iii) Calculate ∠DOF.
d. (iv) State with reason whether ∠BOE and ∠DOF are complementary, supplementary, or neither.