What are the vertical limits of a transition area that is designated in conjunction with an airport having a prescribed IAP?

(Refer to figures 22 and 24.) For planning purposes, what would the highest MEA be on V187 between Grand Junction, Walker Airport, and Durango, La Plata Co. Airport?

(Refer to figure 92.) What is the minimum in flight visibility and distance from clouds required for an airplane operating less than 1,200 feet AGL under special VFR during daylight hours in area 5?

If no MCA is specified, what is the lowest altitude for crossing a radio fix, beyond which a higher minimum applies?