The diagram shows two shaded regions. \(ABC\) is an arc of a circle with centre \(O\), radius \(5\text{ cm}\), and angle \(AOC=1.5\) radians. \(AD\) and \(CE\) are diameters of the circle and \(DE\) is a straight line.

(i) Find the total perimeter of the shaded regions.

(ii) Find the total area of the shaded regions.