Write the radicals.

1. The radical for 半 is 八; 2. The radical for 国 is 囗; 3. The radical for 也 is 乜; 4. 工 - 工 itself is a radical; 5. The radical for 作 is 亻; 6. The radical for 老 is 耂; 7. The radical for 律 is 彳; 8. The radical for 师 is 巾.