1. From the given figure, find the value of \(x\) and \(∠AOC\).
 
50.svg
 
\(x\) =
 
\(∠AOC\) = °.
 
2. From the given figure if \(∠COB\) is 17° and \(∠AOC\) = 4\(x\), then find the value of \(x\).
 
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\(x\) = .