Protect Sheet & Password Protect Code

I have two basic questions.

1) I need to have code to protect the sheet that my user form is writing to. In other words, when the information from the user form is populated to the sheet, I want that sheet protected by a password that I set where I can unlock it, but no one else can.

2) I need to protect my VBA code with a password, I do not know how to do this, I have looked everywhere. I do however think this is something simple and I will kick myself once I find out where it is.

I will attach my workbook to this post so anyone can reference it.