Question 198077
You're off to a great start. Now simply combine the sets A' and C' to perform the set union A' U C'. So take ALL the elements in sets A' and C' and combine them to make a new set (remember to take out duplicates). So after combining the two sets, we get: 



*[Tex \LARGE A^\prime \cup C^\prime = \left\{m,n,o,p,r,s,u,v,w\right\}]




Now the next step is to perform an intersection with the sets *[Tex \LARGE A^\prime \cup C^\prime] and *[Tex \LARGE B^\prime]. So what elements do *[Tex \LARGE A^\prime \cup C^\prime] and *[Tex \LARGE B^\prime] have in common? In other words, what are the common elements between the sets *[Tex \LARGE \left\{m,n,o,p,r,s,u,v,w\right\}] and *[Tex \LARGE \left\{l, m, p, q, t, u\right\}] ? Since these sets only have the elements "m","p",and "u" in common, this means that




*[Tex \LARGE \left(A^\prime \cup C^\prime\right) \cap B^\prime = \left\{m,p,u\right\}] 



Let me know if this makes sense.