In a right-angled triangle PQR, ∠Q=90∘. Side QR = 8 cm and ∠P=30∘.
a. (i) State the names of the sides that are opposite, adjacent, and hypotenuse with respect to ∠P.
b. (ii) Write the trigonometric ratio that involves side QR and side PQ.
c. (iii) Calculate the length of side PQ, leaving your answer in simplest form if necessary.