Quite a few candidates attempted this questions and fewer still, attempted the (b) part of the question which was on geometrical construction, an area which is traditionally dodged by majority of the candidates.
While the (a) part was very well done, the (b) part proved to be difficult for many. Majority of them had problems in drawing line PS parallel to QR. They could only draw the line /PQ/ = 7 cm or /QR/ = 11 cm and probably angle 60°.