The circuit in Fig. 8.96 contains two switches that always move in perfect synchronization...

The circuit in Fig. 8.96 contains two switches that always move in perfect synchronization. However, when switch A opens, switch B closes, and vice versa. Switch A is initially open, while switch B is initially closed; they change positions every 40 ms. Using the bottom node as the reference node, determine the voltage across the capacitor at t equal to (a) 0−; (b) 0+; (c) 40− ms; (d) 40+ ms; (e) 50 ms.