1. Which function below is a solution to d'y _4y = 0? dx2 (a) y = 4x (d) y = et (b) y= 2.2 e y = er (c) y = e2x (f) y = e2x2 2. The curve below is a solution of the differential equation du = k- v dt for some constant k. Determine if each statement below is true or false: a) True or False: lim - du = k t-70 dt (b) True or False: lim v(t) = k 1 7 00 (c) True or False: v'(0) = k (d) True or False: y = k is the horizontal asymptote in the graph