Let f (u, v) = (tan(u 1) e, 8u 7v) and g (x, y) = (e(xy), 9 (x y)) . Calculate f g. (Write your solution using the form (*,*). Use symbolic notation and fractions where needed.) f.g= Incorrect - Calculate D (f g) (1,1). (Express numbers in exact form. Give your answer as comma separated list of a, b, c, d from [a D (f g) (1, 1) = Incorrect -9e,9e,18,-252 d .)