Which two statements correctly describe certificate classes used in the PKI? (Choose two.)

A digital certificate class is identified by a number. The higher the number, the more trusted the certificate. The classes include the following:Class 0 is for testing purposes in which no checks have been performed.
Class 1 is for individuals with a focus on verification of email.
Class 2 is for organizations for which proof of identity is required.
Class 3 is for servers and software signing for which independent verification and checking of identity and authority is done by the issuing certificate authority.
Class 4 is for online business transactions between companies.
Class 5 is for private organizations or governmental security.