Compute the annual payment for a mortgage (principal and debt service): 1m$ loan size, 7.3%, 30 years

Compute the WACC with the following assumptions: beta 1.10, cost of equity 12% and cost of debt 9% and equal weight, corporate tax 35%

Compute the present value of a perpetual stream of cash flow of 80.000$, growth rate 3% and WACC of 8%.