I need the following information about Residential Mortgage Backed Securities (RMBS) in simple terms for somebody that understands very little about finance.

What are RMBS? o Trust Structure o Tranches o Risk o Supporting Loan Groups o Credit Enhancement o Etc. Risk Assessment o Underlying Mortgage Loans o Key Variables/factors RMBS Transactions o Offering Documents (prospectus, supplement, PSA, MlpA) o Disclosure in the offering documents o R & W from seller Repurchase Substitution Cure Roles and responsibilities of key parties o Trustee o Sponsor o Issuers o Servicer o Master Servicer o Depositor o Originator