(a) An angle measures x∘, where 0∘<x<180∘. Answer the following questions with proper reasons.
a. (i) Define complementary angles.
b. (ii) An angle measures 112∘. State, with reason, whether it possesses a complement.
c. (iii) For an angle of x∘, write the condition on x so that its complement exists and explain why this condition is necessary.