In which type of economic system are resources owned and controlled by private individuals?

The following Venn diagram indicates

Which of the following reaction involve homogeneous equilibrium and which involve heterogeneous equilibrium?

$2\mathrm{Cu}{\left({\mathrm{NO}}_3\right)}_2\left(\mathrm{s}\right)\stackrel{ }{\rightleftharpoons }2\mathrm{CuO}\left(\mathrm{s}\right)+4{\mathrm{NO}}_2\left(\mathrm{g}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$

How is the attainment of equilibrium recognised in case of following equilibria?

Dissociation of ${\mathrm{N}}_2{\mathrm{O}}_5$ in a closed vessel.

${\mathrm{K}}_{\mathrm{p}}$ for the following reaction will be equal to

$3{\mathrm{Fe}}_{\left(\mathrm{s}\right)}+4{\mathrm{H}}_2{\mathrm{O}}_{\left(\mathrm{g}\right)}\rightleftharpoons {\mathrm{Fe}}_3{\mathrm{O}}_{4\left(\mathrm{s}\right)}+4{\mathrm{H}}_{2\left(\mathrm{g}\right)}$