[填空题]
A surveillance camera records the area in front of a warehok7h i7 /qpn;vaj+ vs4uuse, shown as the sha7v+ nh4q7;j asv/kpuio*(7( ao0v rt3c t4xmzfsq9 dxded area in the following diagram. The camera's field of view has a radial distance of 15m o9 of0 rsq4(xmc7zv3 at(d*xt, 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. $m^2$
