Could someone please help me with these quick physics questions?

5. Four currents "intersect" as shown. Determine and explain the magnitude and direction of the two unknown currents I, and I2 . 6A 12 2A 3A 6. You need to pass current through this solid rectangular B box. If you want the resistance to be as small as C possible, should you direct it perpendicular to face A A,B, or C? Explain. 7. Two conductors made of the same material each have the same voltage drop across them. One conductor (A) is twice as long as the other (B) and also has twice the diameter. Determine the ratio of the power delivered to A to the power delivered to B. Explain/calculate.A current passes through five conductors with circular cross sections. Conductors I, II, and V all have the same length but they have different resistivities (P/, etc.) and different radii (R1, etc.). Conductors III and IV have the same radii and length but Pill > Piv. Use this information for Questions #8-10. 8. Which is larger: the voltage across III conductor III or conductor IV or are I II V they the same? IV