In the diagram, AOB is a quarter circle with centre O and radius r. The point C lies on the arc AB and the point D lies on OB. The line CD is parallel to AO and angle AOC = θ radians.

(i) Express the perimeter of the shaded region in terms of r, θ and π.

(ii) For the case where r = 5 cm and θ = 0.6, find the area of the shaded region.