Consider a CMBS with the following characteristics: - Backed by $20M mortgages, 7% interest, 5-yr maturity, IO annual payments , no servicer fee - There are three tranches issued: $13M Tranche A (Senior/Investment Grade CMBS) with coupon rate 5% $7M Tranche B (Junior/ Non-investment Grade CMBS) with coupon rate 6% IO residual tranche (no extra collateral, but collects extra interest) Assume no defaults. What is the cash flow to Tranche A in year 1