2) To create the valid non-redeemable address for destroying coins, we will use this online address generator: http://gobittest.appspot.com/Address
Using this byte sequence as public key to return invalid: (Section 1 - Public ECDSA Key)
0800000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000
Enter this line to "Public ECDSA Key" field and press "Send" button - This will return the error "Invalid public key length". After this you need to set the correct address version. Go down to section 4 and edit the first byte of "Adding network bytes to 3" field, set it to 4D Yang and 8C for Yin(First two characters). Now you can press "Send" button and get the Yin or Yang address used for destroying the coins, which corresponds to invalid public key.