How to import a SSL Cert and Key to F5.

.cer, crt, and .p7b files are almost always (public) certificates. A private key would normally have a .key or .pem extension, but of course can be stored in pkcs12 .p12 or .pfx file. It doesn't look like any of the certificates you've listed are private keys, but you may still need to open them all in a text editor to know for sure.

If the file contains a string that looks like this

-----BEGIN RSA PRIVATE KEY-----

then that will be a private key.