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A copper wire 100m long with cross-sectional area of 2x10^-4 cm^2 is heated from room temperature...

A copper wire 100m long with cross-sectional area of 2x10^-4 cm^2 is heated from room temperature of 25 C to 200 C. Find
a) The initial resistance of wire
b) The increase in resistance from 25 to 200 C
c) The drift speed of the “electron group” in the wire, if the current is 3A and density of
electrons is 8.5x10^28 electrons /m 3
d) The voltage drop across the wire resistor for this current of 3A
e) The power dissipated by resistor.

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