I. 11.12 Triple Integrals

Calculate the surface integral according to the Gauss-Ostrograd formula: \ [\ iint_ {s} y d x d z, \ text {where} s: \ frac {x^{2}} {a^{2}+\ frac {y^{2} {b^{2}}+\ frac {z^{2}} {c^{2}} = 1. \]