The displacement of a machine is expressed as \(x(t)=A \sin (6 t+\phi)\), where \(x\) is in meters and \(t\) is in seconds. If the displacement and the velocity of the machine at \(t=0\) are known to be \(0.05 \mathrm{~m}\) and \(0.005 \mathrm{~m} / \mathrm{s}\), respectively, determine the values of \(A\) and \(\phi\).