an exponential voltage decay v$($t$)=$v$(0)$e$^-$t$/$T is observed with an oscilloscope. if it is found that v$(1$ us$)=12\mathrm{.}28$V and v$(7$us$)=3\mathrm{.}7$V $($a$)$ find v$(0)$ and t$,$ and $($b$)$ predict v$(10$us$)$