Which statements on classical cryptography fundamentals are correct

$$ In asymmetric cryptography the relationship between the public key and private key is asymmetric, so for the encryption it is easy to compute a private key from the public key, while the opposite operation is difficult.

$$ An encryption scheme is deterministic if a particular plaintext is mapped to the same ciphertext when the key used has not been changed.

$$ The encryption function in the RSA cipher is simply only an exponentiation $($by the e component of the public key$)$ modulo n$,$ while the decryption function is exponentiation with a different exponent, namely d constituting the private key used for decryption.

$$ In breaking DES cryptosystem differential cryptanalysis is more efficient than linear cryptanalysis.