4. An aluminum wire has a cross-section (that stands for A, P or S) of 5*10^-7 m². The strength of the electric field in the wire is 0.64 V/m. The resistance of aluminum is 2.63*10^-8 Om

a) What is the strength of the current through the wire?

b) What is the potential difference between two points on the wire 10 m apart?

c) What is the resistance of a 10 m long wire?​