hand written solution required

We want to stabilize the system x = Ax(t) + Bu(t) using the state feedback u(t) = -px1 (t), where u is a real-valued parameter. Find the possible values of / for each of the following pairs, such that the closed-loop system is (a) asymptotically stable and (b) marginally stable. 12 -5 6 (a) A = 0 0 L, B = 0 -6 -3 (b) A = ] 2 (c) A = 2. B