\(V_{z}=5.6 v\)

\(V_{R_1}=9-5.6\)

\(V_{R_1}=3.4\)

\(\mathrm{I}_{\mathrm{R}_{1}}=\frac{\mathrm{V}_{\mathrm{R}_{1}}}{\mathrm{R}}=\frac{3.4}{200} ; \mathrm{I}_{\mathrm{R}_{1}}=17 \mathrm{mA}\)

\({{\text{V}}_{\text{z}}}={{\text{V}}_{{{\text{R}}_{2}}}}={{\text{I}}_{{{\text{R}}_{2}}}}\left( {{\text{R}}_{2}} \right)\)

\(\frac{5.6}{800}={{\text{l}}_{{{\text{R}}_{2}}}}\)  ;  \({{I}_{{{\text{R}}_{2}}}}=7\text{mA}\)

\({{I}_{\text{z}}}=(17-7)\,\text{mA}=10\,\text{mA}\)