In △PQR, ∠Q=90∘. The perpendicular from Q to the hypotenuse PR meets PR at S. Given PQ=15cm and QR=20cm, solve the following:
a. (i) Calculate the length of PR.
b. (ii) Find the length of the altitude QS.
c. (iii) Determine the lengths of the segments PS and SR on the hypotenuse.