Why has the Exminer given you advanced notification of the route? Normally about 2 hours is all you should have to stop you asking questions of others.
Because this is a mock test and only a lesson, although the instructor has unfortunately made it quite unrealistic by giving the route so far ahead of time, as for the real test ultimately part of the test is being able to plan the flight in a reasonable amount of time (i.e. not taking 7 days to plan a one hour nav leg)