annampilot,
Q2 can be worked out using mental maths.
The aircraft is tracking due North, therefore following the 17822W meridian. It flies for 2950Nm which 1 degree being 60Nm equals approx 49 degrees, so from 4 degrees South it flies to 45 degrees north, now you have a choice of 2 answers. So it turns left 99 degrees (heading slightly south of further West) for 314Km which is approx 169Nm, at 45 degrees North it will cross the 180 meridian this now becomes an Eastern position, which can only be answer D. No need for plotting chart or completely accurate calculations just a pencil and paper to draw(if need be) the course of the aircraft. These sort of questions sound complex, but looking at the simplistic way of doing it can save you time during an exam, try not to look too deep into them.