[填空题]
On a trip to Morocco,;b .cyi-ewd27ju0tlu a group of tourists experience a horse trek th ecoc6sr4tw,) rough the Saharan desert. They start from a horse farm )c4swtcr,o 6e, moving on a bearing of $075^{\circ}$ 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. $^{\circ}$
