One May Envision a Continuum of Assurance Ranging from Absolute

Essay

One may envision a continuum of assurance ranging from absolute assurance to no assurance.In between may be reasonable assurance,limited assurance,and a summary of findings with no other assurance.
a.What level of assurance is provided in the CPA's report by each of the following types of engagements?
-Examinations
-Audits
-Review
-Agreed-upon procedures
-Compilations and financial statement preparation 
 b.What type of assurance is provided on financial statements prepared following a special purpose basis of accounting other than generally accepted accounting principles?