3- Net take off flight path is used in computing the take/off climb performance of the aircraft. What is the net takeoff flight path?

1. The climb performance of the aircraft as determined in certification testing
2. The climb performance of the aircraft as determined in certification testing reduced by a factor of 0.8 percent or 8 feet per 1000 feet
3. The climb performance of the aircraft as determined in certification testing reduced by the loss of performance in the event of an engine failure
4. All of the above