In a circle of radius 21 cm, an arc subtends an angle of 60° at the center. Find:

**(i)** length of the arc.

**(ii)** area of the sector formed by the arc.

**(iii)** area of the segment formed by the corresponding chord.

**(i)** length of the arc.

**(ii)** area of the sector formed by the arc.

**(iii)** area of the segment formed by the corresponding chord.