Use find to produce a long ls listing of all files in

Question

• Give the command-line of using find to list all the files having specific username in the current directory
• Give the command-line of using find to list all the subdirectories in the current directory
• Use find to produce a long ls listing of all files in /usr/bin that are more than 750Kb long. Give all the arguments and options in the following command-line
find ..... -exec ls -l {} \;

Note that pay special attention to the arguments or options. The semicolon must be escaped, but not the {}.