$[$please provide using Excel functions if possible$]$ you run a construction firm. You have just won a contract to build a government $[$office building. Building it will require an investment of $$10$million today and $$5$million in one year. The government will pay you $$20$million in one year upon the building$$s completion. Assume the cost of capital is $10\%.$

What is the NPV of this opportunity?

How can your firm turn this NPV into cash today?