\(A\), \(B\), \(C\) and \(D\) lie on a circle with centre \(O\). \(ST\) is tangent at \(A\). Angle \(ABC=119^\circ\) and angle \(ODA=29^\circ\).
Determine whether \(CD\) and \(ST\) are parallel. Give a reason for every step.[4]
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