5 The number of eagles seen per hour in a certain location has the distribution \(\operatorname { Po } ( 1.8 )\). The number of vultures seen per hour in the same location has the independent distribution \(\operatorname { Po } ( 2.6 )\).

1. Find the probability that, in a randomly chosen hour, at least 2 eagles are seen.
2. Find the probability that, in a randomly chosen half-hour period, the total number of eagles and vultures seen is less than 5 .
   Alex wants to be at least \(99 \%\) certain of seeing at least 1 eagle.
3. Find the minimum time for which she should watch for eagles.