Perform one iteration of the optimal gradient steepest descent method to locate the minimum of f(x, y) = -8*x+x.^2+12*y+4*y.^2-2.*x.*y using initial guesses x = 0 and y = 0. For more information on this MATLAB problem please go to http://numericalmethodsforengineerscsc.blogspot.com/2012/05/problem-148-numerical-methods.html