This, like stated above, is a problem for calculus whizzes. I am STUCK..

Q What is the greatest possible area of a triangle formed in the first quadrant by the x-axis, the y-axis, and a line tangent to the curve y=e^-x?

Any help would be appreciated. If it's not too much to ask, could i possibly see the work done when figuring out this problem. I don't really just want the answer, so if you could even point me in the direction, that'd be okay too..

-MHENK