Create commands in linux

1. Write a command that will list the names of all executable files in the working directory, sorted by file size.

2.Write a command that will list the names of all non-executable files in the working directory, sorted modification time.

3. Write a command that will list the name of the file with the highest numeric permission in the working directory. "Highest numeric permission" means the permission with the largest octal value, where "rwxrwxrwx" is 777, and "---------" is 000.

4.Modify your command from Question 3 so that the output is sorted by octal permission number, in descending order.