What is the third fundamental skill in attitude instrument flying?

Pressure altitude is the altitude read on your altimeter when the instrument is adjusted to indicate height above

The gyroscopic heading indicator is inoperative. What is the primary bank instrument in unaccelerated straight and level flight?

What indications should you observe on the turn and slip indicator during taxi?

As power is reduced to change airspeed from high to low cruise in level flight, which instruments are primary for pitch, bank, and power, respectively?