[填空题]
A surveillance camera recordejcri k.s/ 42 nfpji*: uuu2)zs the a2 eb9o t-oo.z0wbjko4*iz;h3 jo 7 tdmrea in front of a warehouse, shown as the shaded area in the following diagram. The camera's field of view has a radial distanco di o0tb;t43om.ozwbe- k2o7 *j hzj9e 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. $m^2$
