Mutley,
Remember.
"East/West distance is Departure." This is the key to why you are getting stuck on both of these.
Thus the East/West elements of those question are equal to the Departure.
Departure = change of longitude x cosine latitude
(Remember that the change of longitude is in minutes in the departure equation above, not degrees as it is in the Convergency equation.)
Just rearrange the departure equation to find the change in longitude along the East/West bits... and Robert's your Father's Brother. PM if you want more help!
