The standard reduction potential at 298 K for the following half cells are given below $\\ \mathrm{NO}-33-+4 \mathrm{H}++3 \mathrm{e}-\rightarrow \mathrm{NO}(\mathrm{~g})+2 \mathrm{H} 2 \mathrm{O} \mathrm{EO}=0.97 \mathrm{~V} \\$ $V^{2+}(a q)+2 e^{-} \rightarrow V \quad \mathrm{E}^0=-1.19 \mathrm{~V} \\$ $F e^{3+}(a q)+3 e^{-} \rightarrow F e \quad \mathrm{E}^0=-0.04 \mathrm{~V} \\$ $A g^{+}(a q)+e^{-} \rightarrow A g(s) \quad \mathrm{E}^0=0.80 \mathrm{~V} \\$ $A u^{3+}(a q)+3 e^{-} \rightarrow A u(s) \mathrm{E}^0=1.40 \mathrm{~V}\\$ The number of metal(s) which will be oxidized by $\mathrm{NO}_3^{-}$Oin aqueous solution is $\_\_\_\_$ .