(1 point) For each of the following vector fields F, decide whether it is conservative or not by computing the appropriate type N first order partial derivatives. Type in a potential function f (that is, â½f-F) with f(0, 0-0. ifit is not conservative, A. F (z, y) = (-82-dy) i + (-4m + 49] f (x, y) f(x,v)= C. F (x,)(-4 sin g) i (-8y 4z cos y) j f(x,y) = Note: Your answers should be either expressions of x and y (e.g. "3xy + 2y"), or the letter "N"