There is a 4 probability that the plane used for a commercia

There is a 4% probability that the plane used for a commercial flight has technical problems, and this causes a delay in the flight. If there are no technical problems with the plane, then there is still a 35% probability that the flight is delayed due to all other reasons.

(a) What is the probability that the flight is delayed?

(b) What is the probability that a flight delay was caused by technical problems?