Question

We can look at the same circuit topology but replace the inductor with a capacitor seen in Figure 7. We also change the current function, such that I(t)=5u(−t) Amps.
In the circuit, C=200.0mF, R1=12Ω, R2=8Ω, and R3=5Ω.
(c) What is the value of vC(t) for t<0 (in Volts)?
(d) What is the value of vC(t) at t=0+ (in Volts)?
(e) What is the value for vC(t) at t=500.0ms (in Volts)?
please helpp..