Write down the set represented by the following shaded region.[1]
Given that \(\xi=\{x:x\text{ is an integer},\ 1\leq x<13\}\), and its subsets are \(A=\{x:x\text{ is a factor of}\hspace{0.5em}16\}\), \(B=\{x:x\text{ is a prime number}\hspace{0.15em}\}\) and \(C=\{x:9-x\geq1\}\),
List the elements in the set \(A\cap B\).[1]
Find \(n(B'\cup C)\).[1]
Explain clearly if \(A\subset C\).[1]
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