Which instrument provides the most pertinent information (primary) for bank control in straight and level flight?

What instruments are considered supporting bank instruments during a straight, stabilized climb at a constant rate?

(Refer to figure 144.) What changes in control displacement should be made so that “2” would result in a coordinated standard rate turn?

What is the first fundamental skill in attitude instrument flying?

(Refer to figure 149.) What is the flight attitude? One system which transmits information to the instruments has malfunctioned.