A local aquarium wants to model their visitor rate to determine whether or not to introduce staggered entrance times for guests on weekends. According to their records, over a randomly sampled series of many weekends, they had 4463 guests with a standard deviation of 1272. The distribution was approximately normal.

1. Once they reach more than 5000 guests, they will need to consider introducing staggered entrance times. On what percentage of weekends can they expect to do so?

1. If they have less than 2000 guests, they can move to open-seating for their aquatic shows. On what percentage of weekends can they expect to do so?

1. They believe their optimal number of guests is between 3800 and 4300. On what percentage of weekends can they expect to see this number of guests?