How to get access to funds on keys that were derived using public key child derivation? BIP 32

Question

If I have a key m/0'/0' and I'm using CKDpub to derive m/0'/0'/0 and then CKDPub to get m/0'/0'/0/0. How do I get access to the funds on the addresses generated by CKDPub?

Can m/0'/0' -> CKDPriv -> CKDPriv => m/0'/0'/0/0 key use those funds?

Another way: if I take a private/public key pair, use CKDPub on the public and CKDPriv on the private, do they yield the same public keys?

Answer 1

if I take a private/public key pair, use CKDPub on the public and CKDPriv on the private, do they yield the same public keys?

For unhardened childs, yes.