STION 1 In the diagramm below, P(7; 4), Q(6; 6), R(0; 3) and (t; /k) are the vertices of quadrilateral PQRS. R(0:3) e S (tk) Q(6:6) P(7:4) 1.1 1.2 If T 22 Calculate the length of PQ. Leave your answer in surd form. 11 (2) 1 is the midpoint of QS, determine the coordinates of S, (3) 1.3 Show that the coordinates of S are (1; 1), show that PR=QS. (2) 1.4 Show that QR is perpendicular to RS. (4) 1.5 Hence, what type of special quadrilateral is PQRS? Motivate your answer, (2) 1.6 Calculate the size of RSQ. (3)