There are three electric bulbs designed for voltage U = 110V each, the powers of which are respectively P₁ = 40; P₂ = 40; P₃ = 80 W. How should these bulbs be turned on so that they give a normal glow at a voltage of Uo = 220 V? Find the strength of the currents I₁; I₂; I₃; passing through light bulbs, at normal incandescence. Draw a diagram.

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