[填空题]
A surveillance camerf-wjjgx1f61fd6l moe zplcw0;z3 6 y .a records the area in front of a2 vm b5j(hjrjx)f t)4y warehouse, shown as the shaded area in the following diagram. The camera's field of view has a radial distance of 15m, reaching a maxmb (fht5 j)2y j)4vjrximum 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. $m^2$
