Consider the following narrative describing the process of planning a vacation:

Yannis is planning a trip to Hawaii with a friend. They first decide when they want to go and how much they can afford to spend. Then, they make their flight and hotel reservations. They wait until the scheduled departure. They travel to Hawaii and stay in the hotel. They enjoy a number of tourist activities. When their time in Hawaii is done they fly home.

a. For each step in the diagram from the beginning, enter the appropriate symbol and label. If two events can occur at the same time, enter information for both. The 1st, 4th, and 10th steps have been entered for examples.