[填空题]
On a trip to Morocco, a group o36wz0u8bve:cm 5yrujqtt y1 qu 52h ,nf touh .pqgbuf-43vrists experience a horse trek through the Saharan desert. They start from a horse farm, moving on a bearing -gfq4u p.vh3bof $075^{\circ}$ for 3.2km to reach an oasis. After taking a rest there, they take another ride on a bearing of $210^{\circ}$ for 2.1km to visit the Draa valley.
1.Find the distance that they need to cover to get back to the farm. km
2.Determine the bearing they should ride on to get back to the farm. $^{\circ}$
