Identify whether homogeneous, separable, separable and homogenous, or none of the choices. 1. 3xdy - 4ydx = 0 2. (x2+y2)dx - xydy = 0 3. Find the general solution of (y+2x)dy + ydx = 0 a ) y2 ( 3y+ x ) = C b) x2(3 x+y) = C c) y2(3x+y) = C d) None of the above 4. Find the general solution of (x-y)(4x+y)dx + x(5x-y)dy = 0 a) y(y+x)2 = C (y-2x) b) x(y+x)2 = C (y-2x) c) x(y+x) 2 = C (y+2x) d) None of the above