A concrete pillar, which is reinforced with steel rods, supports a compressive axial load of 2 MN.

(a) Determine stresses σ_{1} and σ_{2} given the following:

For the steel, A_{1} = 4 × 10^{−3} m^{2} and E_{1} = 2 × 10^{11} N/m^{2}

For the concrete, A_{2} = 0.2 m^{2} and E_{2} = 2 × 10^{10} N/m^{2}

(b) What percentage of the total load does the steel reinforcement take?