26 The diagram below shows triangle ABC. (a) The point D is on the opposite side of AC to B. AD = 6 cm and CD = 8 cm. Construct triangle ADC. (b) On the diagram, construct the locus of points inside the quadrilateral ABCD that are (i) 2.5 cm from AC, (ii) equidistant from AB and BC. (c) The points P and Q are 2.5 cm from AC and equidistant from AB and BC. Mark and label P and Q . Measure PQ.