ame: Id: (10 points) (ex cosy + xy)dy + (ex siny + bxy2) dx = 0. If the given differential equation is exact, then find b. b) 0

(10 points) (excosy+x3y)dy+(exsiny+bx2y2)dx=0. If the given differential equation is exact, then find b. a) 2 b) 0 c) 23 d) 43 e) 3