need help on linux

1. [10 points] Use find to display the names of all files (starting in the current directory, any current directory) that have the "tex" extension. This must recursively search the directories below the current one. Hint: you must use a wildcard for the filename and wildcards are problem you have to to solve. You need to actually test this by by creating several levels of directories and putting some ".tex" files in some of them. If you do not make a directory tree to test on, you are likely to get incorrect results. Because you do NOT care what is in the files, you can create a ".tex" in some directory by simply doing $> touch file1.tex and voila you have new empty file. And find does not care if it is empty or not