For the second transaction, (c4d334244395d650b49a2b7fe1975547903cf18bb360c90c5733aea04b927c69), do you own the address 1FspD? If you do, you can try CPFP to try to entice the miners to accept your transaction. If not, then you can't do both RBF and CPFP.
Yes receive address is mine. (its my exchange account wallet address). if i do RBF or CPFP, which private key should i get Exodus wallet or blockchain.com wallet ?.
Yes. Just accelerate the transaction above and the accelerator will calculate the fees to accelerate both transactions since the prior transaction has to be confirmed before your transaction above can.
is it 100% success method?.
If transaction not confirm what will happened?. Will it return back to my wallet?.