* = ($2 + 1 2 ) 2 3. Given a function f (x, y) =In (xy ) where () = ( $3 4/3)2 . Use the general chain rule to find find . Put as your final answers in terms of just s, t. 4. Given a function f (x, y) where x is also a function of s and t; while y is just a function of t only . Construct a tree diagram and use it to construct the rule to find ds