I have this work problem that I cannot make sense out of. Can you help with each step?

Merriwether Building has operating income of $20 million, a tax rate of 40%, and no debt. It pays out all of its net income as dividends and has a zero growth rate. The current stock price is $40 per share, and it has 2.5 million shares of stock outstanding. If it moves to a capital structure that has 40% debt and 60% equity (based on market values), its investment bankers believe its weighted average cost of capital would be 10%. What would its stock price be if it changes to the new capital structure?