The curve 
cross itself at some point 
Find the equations of both tangent lines at that point.
Definitions:
Comment Lines
Lines within a program's code meant for documentation purposes and not executed as part of the program's logic.
Syntax Error
An error in the syntax of a sequence of characters or tokens that is intended to be written in a particular programming language.
VBA Keyword
A reserved word in Visual Basic for Applications programming language that has a special meaning and is used to execute specific commands or tasks.
Visual Basic Editor
An integrated development environment (IDE) used for editing VBA (Visual Basic for Applications) code within Microsoft Office applications.
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