$4.$ Describe how PCAOB inspections provide value to the following parties:

a$.$ Investors

b$.$ Preparers $($i$.$e$.,$ company management$)$

c$.$ Audit Committees $($i$.$e$.,$ those charged with governance$)$

d$.$ Registered Accounting Firms

e$.$ Other Public Accounting Firms

f$.$ The Securities and Exchange Commission $($SEC$)$