ABC Ltd has ₹10 billion capital invested. Currently, it has a capital structure whereby 30 per cent is debt and 70 per cent is equity. The return on equity is 16 per cent and on debt is 10 per cent. The company is planning to change the capital structure to 50 per cent debt and 50 per cent equity. What is the likely cost of capital and the required return on equity? Assume no taxes.