$(1$ point$)$ This question concerns block cipher padding. Suppose the block cipher has a block size of $18$ bytes. A certain message ends with a block which is $18$ bytes. We must reversibly pad out the message to use some block cipher modes, such as CBC $($even if the last block is full, which it is in this case$).$

Consider the following padding strategy.

Append a single byte with value $128,$ and then as many zero bytes as required to make the overall length a multiple of $18.$

Suppose the final $($possibly partial$)$ block of the message is $"0$x$000102030405060708090$a$0$b$0$c$0$d$0$e$0$f$1011"$ in hexadecimal. Write out the complete final block in hexadecimal. Please do not put a leading $0x$ as this has been written already. Because the last block is actually full, the block you add will need to be a completely new block