The odds of a computer engineering student on a field trip to Algonquin Park encountering a snake for a day is estimated at 13%. Such an event is assumed to be independent from one day to the next.

1. What is the probability that the third snake will not be encountered by this student on the fifth day of the field trip?

2. It is assumed that two days have passed without such a meeting taking place. What is the probability that this student will wait at most three days to encounter a first snake there?