Consider the following statements and arrange in the order of true / false :

${\mathrm{S}}_1$ : In ${\mathrm{SnCl}}_2$, the bonding takes place in ground state and the bond angle $\mathrm{Cl}-\mathrm{Sn}-\mathrm{Cl}$ is slightly less than 120°.

${\mathrm{S}}_2$ : The molecular geometry of ${\mathrm{XeF}}_7^{+}$ is pentagonal bipyramidal having two different $\mathrm{Xe}-\mathrm{F}$ bond lengths.

${\mathrm{S}}_3$ : In ${\mathrm{SF}}_4$, the bond angles, instead of being 9" 0 and 180° are 89° and 177° respectively due the presence of a lone pair.