Please help with openssl secure programming question....Thanks!!!!!

Using openssl command to use DES ECB mode to encrypt a text file "panther.txt" into file "enctext.des-ecb with the key "0f1571c947d9e859"

Using openssl command to use DES ECB mode to decrypt the file "enctext.des-ecb into the file "dectext-des-ecb.txt with the key "0f1571c947d9e859"

Using openssl command to use AES-256 CBC mode to encrypt the file "panther.txt" into file "enctxt1.aes256-cbc" with the key "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 and IV d9000a0800ac3b75111d393ad246ff95"

Using openssl command to use AES-256 CBC mode to decrypt the file "enctxt1.aes256-cbc into file "dectxt-aes256-cbc.txt" with the key "0102030405060708090a0b0c0d0e0f101112131415161718191a1b1c1d1e1f20 and IV d9000a0800ac3b75111d393ad246ff95"

Create the "panther.txt" file contain:

AAAAAAAAAAAAAACCCCCCCCCCCCCBBBBBBBBBBBEEEEEEEEEEEEEDDDDDDDDDDDDDDFFFFFFFFFFFFFFF