P$3$HT samples were subjected to the following treatment: annealing at different temperatures for $7$ h followed by slow cooling. The so$-$ obtained samples are named using the codes reported in the table below. DSC scans of all samples are reported. The enthalpy of fusion is $99$ J$/$g$,$ the density of crystalline phase is $1\mathrm{.}14$ g$/$cm$3$

Use Gibbs$-$Thomson theory to calculate:

a$.$ Equilibrium melt temperature $($melting temperature of the infinitely thick lamellae$)$