Writing bash scripts

Hello, I need someone to write me 2 bash scripts required output is attached 1. [login to view URL] Write a bash-shell script to list all regular files in the current directory that are smaller than n bytes (n is an integer argument). Synopsis: listfs <directory_name> <n bytes> 2. [login to view URL] Write a bash-shell script to replace all occurrences of a word by another word in a file. Synopsis: replaceWord <inFile> <word> <repWord> <outFile>