Can you please help me with this question it's Circle geometry. it's grade 11 mathematics

Heading O 15 m C 135 The centre of the circle is O. Determine the arc length DC. Round to one decimal place 2 A sector of a circle has central angle 6 . and area 153 cm?. What is the radius of the circle? Use 3.14 for pi and round final answer to two decimal place. 3 State the name of the shaded area. Calculate the shaded area - show full solutions. Round final answer to 4 decimal places. 14 ft Upload a picture of your work and type the final answer in the box OR type the full solutions below