Motion of the equilateral triangular plate \(A B C\) in its plane is controlled by the hydraulic cylinder \(D\). If the piston rod in the cylinder is moving upward at the constant rate of \(0.3 \mathrm{~m} / \mathrm{s}\) during an interval of its motion, calculate for the instant when \(\theta=30^{\circ}\) the velocity and acceleration of the center of the roller \(B\) in the horizontal guide and the angular velocity and angular acceleration of edge \(C B\).

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x- B b b = 0.2 m -D-> X * D A