$1\mathrm{.}2\mathrm{.}11$

Determine the stability and determinacy of the following structure.

Select one:

a$.$ Stable, statically indeterminate to the $2$nd degree.

b$.$ Stable, statically indeterminate to the $3$rd degree.

c$.$ Stable, statically indeterminate to the lst degree.

d$.$ Unstable.

e$.$ Stable, statically determinate.