(a) The ratio of sheep to goats on a farm is 4:7. If there are 1,428 sheep, find how many goats are on the farm.

(b) Using a ruler and a pair of compasses only, construct a triangle ABC with |AB| = 6cm, |AC| = 8cm and angle BAC = 30°.
Construct the bisector of angle ACB to meet line AB at D.
(i) Measure |AD| and |BD|
(ii) Write down the ratio |AD|:|BD|.