$($E$6$B$\mathrm{.}8)$ Imagine that if the potential difference between the ends of a $5\mathrm{.}0$m length of wire with

a diameter of $0\mathrm{.}75$mm is $1\mathrm{.}5$ V$,$ we find that it conducts $3\mathrm{.}0$ A$.$

a$.$ What is this wire$$s resistance?

b$.$ What is the magnitude of the electric field in this wire?

c$.$ Which bits of information above are irrelevant?