$13\mathrm{.}25($a$)E$ of the cell calomel$|$nonesuch composed of a

calomel electrode and a nonesuch electrode is $-1978mV$ at

$25C.$ Find the standard electrode potential of the nonesuch

electrode at $25C.($b$)$ At $43C,$ the cell calomel$|$nonpareil has

$E=-0\mathrm{.}80V$ and the cell nonesuch$|$calomel has $E=1\mathrm{.}70V.$

Find $E$ for the cell nonpareil$|$nonesuch at $43C.$