I've been looking at the SEA-TAC VFR map, and something caught my eye...
[![enter image description here](https://i.stack.imgur.com/YHRsX.jpg)](https://i.stack.imgur.com/YHRsX.jpg)

On this map one can see that the SEA-TAC airport has a class B designation in a strange inverse-rhomboid shape, surrounded by, depending on the direction, class C or D airspace.

This is confusing to me, and I am looking for clarification.
Specifically:
There is no Ceiling or floor stated for the class C space. What are the proper ceiling/floor elevations for the class C airspace?
There is also no ceiling or floor for the class D space. What are the proper ceiling/floor elevations here?  

The center of the map also says "see NOTAMSs/SUPPLEMENT" for class D eff hrs. I didn't get any supplement with this digital map.. where would I find this information?