A rescue helicopter is stationed at a point X. An emergency call is received and the helicopter flies 16km on a bearing of 040 degrees to point Y. A second emergency call is received and the helicopter then flies 30km on a bearing of 115 degrees to arrive at point Z. The helicopter flies back to point X. a) work out the distance that the helicopter has to fly from point Z to point X. give your answer correct to 3 significant figures. b) work out the bearing on which the helicopter has to fly to from point Z to point X. give your answer as a three-figure bearing.