Assume that Naperville Co. will use equity to finance a project in Switzerland, while Lombard Co. will rely on a dollar-denominated loan to finance a project in Switzerland, and that Addison Co. will rely on a Swiss franc-denominated loan to finance a project in Switzerland. The firms will arrange their financing in one month. This week, the U.S. risk-free long-term interest rate declined, but interest rates in Switzerland did not change. Do you think the estimated cost of capital for the projects by each of these 3 U.S. firms increased, decreased, or remained unchanged? Explain.