A resistor is to have a constant resistance of 30.0 , independent of temperature. For this, an

A resistor is to have a constant resistance of 30.0 Ω, independent of temperature. For this, an aluminum resistor with resistance R₀ at 0 °C is used in series with a carbon resistor with resistance R₀₂ at 0 °C. Evaluate R₀₁ and R₀₂, given that α₁ = 3.9 × 10−3 °C⁻¹ for aluminum and α₂ = −0.50 × 10⁻³ °C⁻¹ for carbon.