Lines \(l \parallel m\), \(p \parallel q\). Find \(a\), \(b\), \(c\), \(d\).
 
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\(a =\) \(^{\circ}\)
 
\(b =\) \(^{\circ}\)
 
\(c =\) \(^{\circ}\)
 
\(d =\) \(^{\circ}\)