A point charge q₁ = - 3.15 nC is located on the x-axis at x = 2.30 m, and a second point charge q₂ = -6.10 nC is on the y-axis at y = 1.10 m. What is the total electric flux due to these two point charges through a spherical surface centered at the origin and with radius r₁ = 0.685 m?