Probability, normal distribution and poisson process

#1
I don't know how to calculate these three questions
For question one, is it correct to calculate the number no passengers not showing up first and then over the total number of seats in order to get the probability of empty seat.

For question two, i have no idea on it.

For question three, the probability of a given panel has one or more flaws is calculated as 0.0198, but i don't know how to calculate the probability that at most 2 of them have one or more flaws. Use conditional probability?