#### Answer

(a) B $\cup$ C={2,4,6,7,8,9,10}
(b) B $\cap$ C={8}

#### Work Step by Step

A union of sets includes all of the numbers of both sets. An intersection of sets includes all common numbers that are a part of both sets.
(a) B $\cup$ C={2,4,6,7,8,9,10}
(b) B $\cap$ C={8}