8.6  Find the values of Vc and V0 in the circuit of fig. 8.23 and t equals to (a)0-, (b)0+, (c) 1.3ms

8.9  The voltage source 60 - 40u(t) is in series with a 10 ohm resistor and a 50mh inductor.  find the magnitude of the inductor current and voltage

8.11  the circuit shown in fig. 8.41 has been in the form shown for a very long time.  the switch opens at t=0

9.5 (a) choose R1 in the circuit of fig. 9.13 so that the response after t=0 will be critically damped. (b) now select R2 to obtain v(0)

9.11  Give new values for R1 and the two initial voltages in th circuit of fig. 9.36 if the output represents the voltage v(t) in the circuit of fig. 9.37

Please solve and show your work.  the circuits are in the attached file with full questions