Probability of sensor sets alarm on

Sensor is connected an alarm. Sensor sets alarm on with probability 0.95 if dangerous conditions exist in a given day and sets alarm on with probability 0.005 if conditions are not dangerous during the day. And the days with dangerous conditions occur with probability 0.005.

- Probability of sensor turning alarm on?
- Probability that conditions are normal when the alarm triggers on?
- Probability that conditions are dangerous when the alarm does not triggers on?
- How many false alarm (situation described in A) and how many unidentified critical conditions (situation described in B) during a 5-year period?