If two mutually exclusive projects were being compared, would a high cost of capital favor the longer-term project? Why?

If two mutually exclusive projects were being compared, would a high cost of capital favor the longer-term project? Why? If the cost of capital declined, would that lead firms to invest more in longer-term projects or shorter-term projects? Would a decline (or an increase) in the WACC cause changes in the IRR ranking or mutually exclusive projects? Explain