Table:
text: Bố Trạch District
Administrative divisions
Administrative divisions
Number_ Name_of_administrative_unit Telephone_052 Area_km_2_ Population_people
1 Hoàn Lão township 3862242 5.42 7247
2 Nông trường Việt Trung township 3796007 86.00 9506
3 Bắc Trạch rural commune (rc) 3866086 17.24 6413
4 Cự Nẫm rc 3675552 32.79 7562
5 Đại Trạch rc 3862161 24.80 9043
6 Đồng Trạch rc 3864451 6.44 5615
7 Đức Trạch rc 3864192 2.49 6529
8 Hạ Trạch rc 3866406 17.83 4721
9 Hải Trạch rc 3864218 1.97 8707
10 Hoà Trạch rc 3862820 22.00 4612
11 Hoàn Trạch rc 3862435 7.71 3501
12 Hưng Trạch rc 3675051 95.12 10959
13 Lâm Trạch rc 3679371 27.92 3387

Question: In Bố Traạch district in Việt Nam, call the phone 052 for the area km2 with 5.42 ?

Question: At Bố Traạch District, give the administrative unit number for number 4?