Q9. Consider the function f(x, y, z) = ry?z3 + arcsin(x /z). The equal- ity of mixed partials says that fayz = fxzy = fuzz = fyes = fezy - four If you want to calculate fryz there are six (!) possible orders to do it. Which order is the easiest or fastest? (There are multiple possible answers to this.) Explain why your order is the fastest