Can you please put some light on CPAF and FPAF and how they differ from FPIF and CPIF?

Can someone clearly state the difference between all FOUR CPAF,FPAF,FPIF,CPIF.

Also, is PTA only for FPIF or is it applicable to CPIF as well? and is the formula we use is same in both cases?

Also, when we use seller ratio in PFA formulas.

Waiting for your response.

Regards,

Shamir Surani