4 pnts Consider the following differential equation da = a(2 a), r(0) = a < 0. = ro, dt The critical points of the differential equation are a = 0 and r = 2. Match the critical points with Stable/Unstable or None of them. A )x=0 is stable and x=2 is unstable B)x=0 is unstable and x=2 is stable C) x=0 is semi-stable and x=2 is stable D) both of them are unstable E) both of them are stable