I would really just like for someone to explain how to do this. I have no idea what to do. Maybe a short example I could follow.

Cryptography Project 1. Create a 16 character message and convert to numbers using the code below. Space will be zero. Space A C D E F G H K L M N 0 P Q R S T U V W Y 1 2 6 9 10 11 12 13 14 15 16 17 18 19 20 21 22 1 23 24 25 26 2. Arrange the 16 character numerical code in a 4 X 4 Matrix. YOU decide horizontal or vertical, what orientation. 3. Create a different 4X4 matrix using any numbers of your choice. Make sure that it is invertible. Write your encoding matrix and your decoding matrix (the inverse) 4. Encode your message by multiplying the message matrix by the encoding matrix. This is now your ENCODED message. 5. Decode your OWN message! Make sure it works! 6. Create on a sheet of paper a display of your encoded message and decoder. These will be given to others in the class to decode as part of your grade. Make sure all important information to decode is on the display. Extra creativity points will be awarded. 7. Submit a sheet of work showing all of the steps 1 -5 to turn in with your display