Sets ( B ) and ( C ) are subsets of the universal set ( U ). These sets are defined as follows.
[
egin{array}{l}
U={f, k, m, q, r, s, y} \
B={q, s, y} \
C={m, y}
end{array}
]
Find the following sets.
Write your answer in roster form or as ( varnothing ).
(a) ( B^{prime} cup C^{prime}= )
(b) ( B^{prime} cap C= )
