$1.$ Download Cryptool $2$ Software. Familiarise yourself with the interface and look at some of the ready$-$made examples and tutorials on classical ciphers.

$2.$ This ciphertext was produced using mono$-$alphabetic substitution cipher. Use letter frequency analysis to find the original message and the encryption key $($i$.$e$.$ substitution map$).$

$3.$ The image provided has a text message embedded in it using LSB steganography with the password welcome. Use Cryptool $2$ software to find the embedded message. $($Hint: you will need to use the following components: File Input, Text Input, String Decoder, LSB Steganography, String Encoder and Text Output.$)$