(Refer to figure 93.) What is the floor of Class A airspace?

When is a pilot on an IFR flight plan responsible for avoiding other aircraft?

(Refer to figure 93.) What is generally the maximum altitude for Class B airspace?

What responsibility does the pilot in command of an IFR flight assume upon entering VFR conditions?

Acceptable navigational signal coverage at the MOCA is assured for a distance from the VOR of only