Using the following image matrix

$\backslash$table$[[1,2,3,4,5],[6,7,8,9,10],[11,12,13,14,15],[16,17,18,19,20],[21,22,23,24,25]]$

$1-$

Using direct chaotic one$-$dimension method to convert the plain text to stego text $($Hard exam$)?$

$2-$ using direct chaotic two$-$dimension method to convert the plain text to stego text? Mathematical solution step by step