[填空题]
A surveillance camera rezh,mrde;dod1n)u/i 3 cords, n4tgd4i b6uy tc:u/t the area in front of a warehouse, shown as the shaded area in the following diagram. The cauy 4c n:g4t,b6dt t/iumera's field of view has a radial distance of 15m, reaching a maximum distance of 21m away from the camera, and covering an angle of $150^{\circ}$.
1.Calculate the length of the outer arc the camera can record, the arc from point A to point B. m
2.Find the area the camera can record. $m^2$
