A cubic box of side a, oriented as shown, 0 1. Qenel = 6 60 E a2 contains an unknown total charge. The ver- tically directed electric field has a uniform O 2. Qenel = 3 60 Ea2 magnitude E pointing upwards on the top surface and 3 E pointing downward on the E bottom surface, as shown in the figure. 3. Qenel = coa 2 4. Qenel = 3 E Eo a 2 5. Qend = = 60 Ea2 0 6. Qenel = 2 60 Ea? 0 7. Qenel = 0 3E How much charge Q is inside the box? 0 8. Qend = 2 E Eo a 2 9. insufficient information 10. Qenel = 4 60 Ea