Which is true concerning the blue and magenta colors used to depict airports on Sectional Aeronautical Charts?

(Refer to figure 24, area 3.) What is the floor of the Savannah Class C airspace at the shelf area (outer circle)?

What action should a pilot take when operating under VFR in a Military Operations Area (MOA)?

(Refer to figure 26.) At which airports is fixed-wing Special VFR not authorized?