For this question please consider a $10$yr Fixed rate K deal with $1$bn in underlying loans. All loans are $10$yr term with $9\mathrm{.}75$ years of defeasance. For simplicity assume the super seniors A$1/$A$2$ is just one class $($Class A$).$

Part $1$

Please illustrate the payment and loss waterfalls on the $3$ classes $($Class A$,$ AM$,$ D$)?$ Assume instead that the deal receives $200$mm in voluntary prepayments. What is the defeasance adjusted credit support of the AM class now?