MIPS Help asap!

We learned that CMOS naturally builds primitives with inverting outputs such as NAND and NOR and XNOR. Another slightly more complex primitive is OR-AND-INVERT (OAl), used below, and AND-OR-INVERT (AOI). Two of our primitives are used below. When arranged as shown, what fundamental logic operation are they performing? One way to figure this out is to simply make the truth table for the structure below, that is, let A, B take on 00,01, 10,11, and compute the output and examine the output pattern. [fundop]