5. Consider the equation: -2x, - 3x2 + XXzy3 - 8 = 0, which implicitly defines a differentiable function: y = f(x1, X2). a. Use the equation to compute y = f (2,4) b. Find the total differential of the equation, when (x1, X2, y) = (2, 4, f (2, 4)). c. What is the total differential of f(X1, X2), when (X1, X2, y) = (2, 4, f (2, 4))? d. What are the partial derivatives Of /Ox, and Of /Ox2 when (X1, X2, y) = (2, 4, f (2, 4))