Hi again,
For Q2 it sounds like they first want you to consider the higher amplitude signal (signal 1) and where on that wave a 5v positive edge trigger would occur.
For Q1 is sounds like they want you to figure out how many 'incomplete' cycles there are, not how many 'complete' cycles there are. Note that there is one or more complete cycles and one or more incomplete cycles, so you'll have to figure out how many are incomplete.