The temperature coefficient of a certain conducting material is $3\mathrm{.}28\backslash$times $10-3(\backslash$deg C$)7.($a$)$ At what temperature would the resistance be $2$ times the resistance at $20\mathrm{.}0\backslash$deg C$?($Use $20\mathrm{.}0\backslash$deg C as the reference point in P $-$ Po $=$ PoaT $-$ To$).)($b$)$ Does this temperature hold for all copper conductors, regardless of shape or size?