Two Concentric Conducting Spherical Shells Produce a Radially Outward Electric

Two concentric conducting spherical shells produce a radially outward electric field of magnitude 49,000 N/C at a point 4.10 m from the center of the shells.The outer surface of the larger shell has a radius of 3.75 m.If the inner shell contains an excess charge of -5.30 μC,find the amount of charge on the outer surface of the larger shell.
(k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)