1) What is the area of the largest rectangle below the graph of the function f(x)=4-3x^2 and above the x-axis with its base on the x-axis?

-I am unable to post the graph, but I am able to find the equation of the area to be 2z(4-3z^2). However, I do not know how to continue the problem.

Any help will be much appreciated!

-M